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SRCE User Manual - Standardized Reclamation Cost Estimator

1. EQUIPMENT FLEETS EQUIPMENT LABOR UNIT COST UNIT COST Hourl Hourl ACTIVITY AND FLEET B 9 Concrete Wall Demolition General Laborer 0 00 35 73 General Laborer 0 00 35 73 35 73 General Laborer 0 00 35 73 35 73 General Laborer 0 00 35 73 35 73 Foreman 13 03 52 01 65 04 Air Compressor tools 15 46 0 00 15 46 28 49 194 93 Figure 6 Use of Means Crews and Productivities Dozing Distance Calculations The Model uses a simplified estimating technique to determine the effect of dozing distance on the dozer productivity On short dumps or short lifts on multi lift dumps the dozing distance calculation method used is likely to result in a slightly conservative productivity because it assumes that the average distance is assumed to be 2 3 of the calculated final slope length see Figure 7 However on taller slopes the dozer is likely to make numerous shorter cuts at an angle sub parallel to the final slope angle This would result in some double handling of material but the productivity of each dozet push would be much higher than if the 2 3 of final slope length were applied The exact effect of this approximation method will depend on the specific dimensions of the slope to be regraded In some instances the Model is likely to overestimate the total time required to complete the work In others it may slightly underestimate the w
2. Create a Cover with More than Two Layers To create a cover with more than two layers you need to utilize the Haul Material worksheet separately or in association with the facility worksheets Begin by inputting the geometry of the facility you wish to cover in the specific facility worksheet Le WRD Heap leach etc Using the cover and growth material columns you can allow the Model to calculate volumes of each cover you will need to haul and place To find the volume scroll down the worksheet until you come to Cover and Growth Media Costs see Figure 38 Version 1 12 6 4 HOW DO I 4 Cover lower layer Cover Number of Description Replacement Fleet Trucks Total Fleet required Productivity Scrapers Hours LCM hr ial Eover MaterialLover Materialover Materia Figure 34 Waste Rock Dumps Cover and Growth Media Costs Another approach to determining the volume required would be to use the surface area from the facility worksheet and multiply that area by the desired thickness of the covet Sutface areas can be found by scrolling down the facility worksheet until you come to Scarifying Revegetation Costs see Figure 39 You can then transfer the volumes and Surface areas to the Haul Material worksheet Waste Rock Dumps Scarifying Revegetation Costs Description required Final Slope Length m Figure 35 Waste Rock Dumps Scarifying Revegetation Costs The first two cover layers can be e
3. eere 5 25 iii Version 1 12 TABLE OF CONTENTS Figure 28 Construction Management rnnnnnnnnnvvnnnnvnnnnnnnnnnnnnnnvennnnvnnnnnnnnnnnnnnennnn 5 26 Figure 29 Road Maintenance rrsvrnnnavnnnnnvnnnnnnnnnvnnnnnvnnnnnnnnnnnnnnnvnnnnnennnnnnnnnnnnnnner 5 26 Figure 34 Import Cost Data Menu rmsrrnnvvnnnnvnnnnnvnnnnnnnnnvnnnnnvnnnnnnnnnnnnnnnvnnnnvnnnnnnennn 6 1 Figure 35 Import User Data Menu nmssrrnnvvnnnnvnnnnnvnnnnnnnnnvnnnnnvnnnnnnnnnnnnnnnnnnnnvnnnnnnennn 6 2 Figure 36 Multi Lift Slope Inputs additive sess 6 3 Figure 37 Multi Lift Slope Inputs Separate esee 6 4 Figure 38 Waste Rock Dumps Cover and Growth Media Costs 6 5 Figure 39 Waste Rock Dumps Scarifying Revegetation Costs 6 5 Figure 40 Example of User Cost Data eene 6 8 Figure 41 User Tools Version 1 2 or later eese 6 8 Figure 42 Macro Menu n rensvennvvnnnvnnnvnnnnnnnvennnvnnnvnnnvennvnnnvennvnnnennnvennnennnennnenunevunnennner 6 9 Figure 43 Macro Dialog BOX mmrevenannvnnnnnvnnnvvnnnnvnnnnnvnnnnnnnnnvennnnvennnnennnnnnnnnvnnnnnvennnnenne 6 9 Figure 44 NVBond org Web Site rrnnavnnnnnvnnnnvnnnnvnnnnnvnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnner 6 10 Figure 45 Frequently Asked Questions FAQ eene 6 10 Figure 46 K
4. ProjectName y STANDARDIZED RECLAMATION COST ESTIMATOR Version 1 1 54 NOT APPROVED FOR REGULATORY USE IN NEVADA File Name Cost Data File Cost Data Date Cost Data Basis E Data Cost Units Metric Author Source ROJECT INFORMATION Project Name Date of Submittal March 29 2007 Units of Measure Metric m km ha etc English ft mi acres etc Select One Notice or Sm Exploration Pin C Lg Exploration Plan Mine Plan of Operations Select One C Private Land Public or Public Private Cost Basis Category Mine Rates Cost Basis Description Copyright 2004 2006 Jeffrey V Parchley All Rights Reserved Ar ee M 4 M Property Information Table of Contents Cost Summary Draw gt AutoShapesy N NO J Figure 11 Property Information Worksheet non Nevada version shown Exploration Data Because the scale of exploration disturbances is generally smaller than that for mine operations the Model utilizes different equipment and labor fleets crews and productivities for exploration activities Therefore data for exploration projects or exploration activities at mining operations is entered into two exploration worksheets 5 5 Version 1 12 ENTERING DATA in the Model The first worksheet Exploration is used to estimate the cost of exploration drillhole abandonment and reclaiming exploration trenches The Expl Roads amp Pads worksheet contains information
5. This greatly simplifies the input requirements to estimate the cost of reclaiming a large number of exploration roads and drill pads Figure 12 and Figure 13 show the basic input requirements to estimate reclamation costs for exploration roads on a sideslope Figure 13 Exploration Road Inputs The surface area disturbed for use in the calculation of cover and seeding quantities is the surface area as defined by area slope length disturbed by cut fill x total length On flat areas the roads may still require some regrading and or scatifying On slopes of greater than 30 grade the Model assumes that the volume of any sumps needed for drilling fluids is included in the pad regrading volumes On slopes of less than 30 grade the Model uses input from the user in the Individual Sump Volume cell to estimate the total volume of sumps requiring backfilling TIP Minimize the required data input for exploration road reclamation by creating exploration zones of similar slope When entering data for a large number of exploration drill roads and pads first subdivide the exploration into zones of similar slope see Figure 14 Then enter the average slope for that zone the average road width the total length of drill roads pads the total number of pads and the dimensions of the pads as a single row in the wotksheet Include any pads not on roads or on roads to remain after reclamation in the number of pads and include the total length of
6. 6 6 Add Mobilization and Demobilization Costs 6 6 Add Site Specific Costs for Materials 6 7 Get the StdRecCost Menu Back 6 8 Get Additional Help suus 6 10 Report a Model Bug eese 6 11 Make a Suggestion for Future Versions 6 12 Tables Table 1 Dozer Productivity vs Grading Distance sss 2 5 Figures Figure 1 Furstrum of a Pyramidi ensnvvnnnvvnnnnvnnnnnvnnnnnnnnnvennnnnnnnnnnnnnvnnnnnnnnnnvnnnnnvnnnnnnn 2 1 Figure 2 Regrading Volume a Uphill and b Downhill 2 2 Figure 3 Slope Regrading Cross Sectional Area Calculation 2 3 Figure 4 Surface Area CalculationS rrrnnnnnvnnnnnnnnnvnnnnvnnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnnr 2 4 Figure 5 Dozer Productivity vs Distance eese 2 6 Figure 6 Use of Means Crews and Productivities 2 8 Figure 7 Dozing Distance Calculation eese 2 8 Figure 8 Indirect COSTS cit ni deretur 4 6 Figure 9 Adding Facilities eese 5 3 Figure 10 Deleting FacilitieS rrrrnannvnnnnnnnvnnnnnnvnnnnnnnnvnnnnnnnnnnnnnnnnnnnnnnnn
7. Switching between regions within the country or state would only require the user to select a different region on the Property Information worksheet in the Model 4 1 Version 1 12 GATHERING YOUR DATA Source Data The Source Data worksheet is intended to captute basic information about the source of the data used to create the file Some of these cells are automatically filled in by Excel Others require user input Format Version This is an automatic field that is used by the Model to determine if a Data File is in the proper format for the Model version Because of changes in the Model different versions of the Model may require different versions of the Data File to load properly The Data File version is checked by the Model during the Import Data process File Name This is an automatic field that contains the name of the file It will change if you use the Save As command to change the name The next time you open the file the saved name will appear in this field Date This is a user input field that documents the date for which the cost data was valid This is a user input field because the valid date of the data may not be the same as the date that the file was saved Cost Type This is an automatic field that tells the Model if the data imported is standardized or user data This information is set by Excel and cannot be changed Author Source This is a user input field that is used to document the source of the dat
8. companies The labor equipment and material unit rates for hole plugging are included in the cost data file imported by the user 5 21 Version 1 12 ENTERING DATA Figure 24 Well Seal Thicknesses The cost for abandoning both types of wells are similar with production well abandonment including options to remove a pump and perforate the well casing above the water table to when using grout to allow the grout to enter the annular space Both well types have options for several well plugging methods including a top plug only grout a cement plug and nothing Grout volumes are calculated based on 2 0 and 1 25 times the well casing volume for production wells and monitor wells respectively The additional volume allows for migration of grout into the annular space and formation Because production wells are typically larger diameter and deeper the weight of the grout material will force more grout into the formation that a smaller shallower monitor well Misc Costs The Misc Costs module includes a number of additional costs for which productivities have been calculated using published data or information available from contractors Many of these are linear works such as fence installation and removal culvert and pipe removal and power line removal An option for riprap placement is also included The last table in Totals d Production Well Gear Produtt the module Osher Costs can be E _ used by the user to input the 40 Ad
9. livestock grazing agriculture and ranching industry recreation or any other activities which benefit the Commonwealth Providence or the owner of the land Productivity In general terms productivity can be defined as the ratio of the value that labor and equipment produces to the value invested in labor and equipment It is an absolute measure of work process efficiency i e a measure of the extent to which resources ate minimized and wasted effort is eliminated from the work process Profit 1 Gross Profit earnings from an on going business after direct costs of goods sold have been deducted from sales revenue for a given petiod G 5 Version 1 12 GLOSSARY 2 Net Profit earnings or income after subtracting miscellaneous income and expenses patent royalties interest capital gains and federal income tax from opetating profit 3 Operating Profit earnings or income after all expenses selling administrative depreciation have been deducted from gross profit Project management cost see Job overhead Reclamation actions performed during or after an exploration project or mining operation to shape stabilize revegetate or otherwise treat the land in order to return it to a safe stable condition consistent with the establishment of a productive post mining use of the land and the safe abandonment of a facility in a manner which ensures the public safety as well as the encouragement of techniques which minim
10. Administration 12 BLM Indirect Cost 13 Cost Ranges for Indirect Cost Percentages lt lt lt gt 105 1 Engineering Design and Construction ED amp C Plan 7 1 000 000 25 000 000 25 000 000 2 i E Variable Rate S E 8 Bep s SEE 2 VERMES NAE lt lt lt gt 500 000 5 000 000 50 000 000 50 000 000 ES 10 8 5 4 1 5 of labor costs 3 096 ofthe O amp M costs if O amp M costs are gt 100 000 1096 of the O amp M costs lt lt lt gt 1 000 000 25000000 25 000 000 409 gt 8 65 21 of Contract Administration gt HS Figure 8 Indirect Costs Version 1 12 4 6 Chapter Entering Data into the Model Once the data has been collected the process of entering data into the Model is basic data required to create a cost estimate for simple projects little additional effort is necessary to produce a viable cost estimate with the Model However many projects have unique requirements that necessitate the need for special techniques using the Model or external calculation using other tools or methods Most of the modules in the Model allow the user to implement different approaches to calculating the reclamation costs The most appropriate method utilized in each instance will depend on the configuration of the facility and the requirements for re
11. Figure 17 Example Waste Rock Dump The Final Footprint Area for the upper lift areas must be estimated based on the approximate location of the regraded toe The Final Footprint Area for the lower lift areas should reflect the area of the lower lift that will not be covered by the upper lift in its final configuration Underlying Dimension Regraded Description it ii Dump required _ Figure 18 User Input for Example Waste Rock Dump 5 11 Version 1 12 ENTERING DATA In this example the accuracy of the calculations could be increased by further subdividing the lower lift areas Area 4 could be divided into two areas to delineate the northeast slope that has already been covered by topsoil see darker area This would allow the user to the Area 3 could be further subdivided to separate the portion of the slope that has been partially regraded and the portion of the slope that has not yet been regraded southeast corner The decision on how much detail is appropriate is a function of the information available the purpose of the cost estimate and the required level of accuracy required for that purpose O Important Note When working with narrow waste rock dumps or heap leach pads the Model may overestimate the total volume of regrading required if the cross sectional cut areas overlap from one side of the dump to the other Tailings Impoundments The Tailings module addresses the two main components of a ta
12. about the release cf Version 1 1 wich includes a number of bug fixes and improvements m de based on comments made during the official six month mal period in Nevada Note you wil need to download one af the new cost dala fies for this version to work propery Version 2 0 Coming Soon See the What s New page to get the latest information about the upcoming release of Version 2 0 with metic capabilites and lots of new options and a few bug fines Mom War New Modst and Data Flos Manuais Tutonais FA O Supgastions Bu Report Known loaves About SRCE Contact Us R M reri 2004 2008 k E LEUR E 1 Figure 40 NVBond org Web Site You can search for information under the FAQ page which contains answers to common questions asked during the beta testing along with some tips and tricks that were found to be useful ise eae uat ST Soc y ker De eme sch in s rina This page contains arters to common quessicr eshed during bete testing along wit tome tps and ricks het we have found LEAU and preserced hore s QULSJENS ED ki I get an error message telling me that the cost data file am trying to load is 1 mot valid ED aul When you ty to load cost data from a data filo you 60 the folowing 5 message What is the This orror Message appoars whon you try to import a cost data filo that is met in the correct format Because of c
13. and site specific conditions can vary greatly the user must enter the labor crew size for this option O Important Note If additional pumping is required for water treatment either to transport water to the treatment facility or discharge water from the treatment facility the user will need to use the Pumping option to account for those costs The Decontamination option is provided as a placeholder for the management and disposal of decontamination rinse water s required by in jurisdictions and by the 5 27 Version 1 12 ENTERING DATA Cyanide Code decontamination of process facilities may require the rinsing of containers equipment and piping used to convey process solutions The Decontamination option in this module allows the user to account for the capital labor and pumping costs associated with rinsing and disposal of the rinse water Closure Planning reports engineering and permitting for closure Activities entered into this module should include any expected or required plans or studies These costs are entered as lump sums based on quotes estimates or existing information Each table includes a column to document the type of activity and a column for comments L The Closure Planning module has options for including costs for studies Other User The Other User module provides an alternative method of including miscellaneous closure costs in the Summary Costs and ARO LOM modules The user must supply the capital l
14. be added by using the cover and growth material options in the same manner included in many of the other modules For all of the hauling fleets this module also has an option to limit the maximum size of the hauling fleet This can be useful if a small fleet is available to haul a large volume of material If the user enters a non zero positive integer in the Maximum Fleet Size cell for any of the materials primary material cover growth material the Model will use this input value to override the standard formulae that calculate a loader limited or dozer limited fleet size for truck loader ot dozer scrapet fleet respectively Foundations and Buildings The Foundations amp Buildings module provides a simple method to estimate the cost to demolish buildings foundation slabs and foundation walls It also provides options to place cover and or growth media and scatify and revegetate building areas Version 1 12 5 16 ENTERING DATA There is no option to perform regrading in this module so if regrading is required use the Yards module to estimate that cost The Foundations amp Buildings module uses basic cost volume and cost atea calculations to estimate building and wall and slab demolition costs The source of the demolition productivities and crews is Means Heavy Construction used by permission The cost data imported into the Model from a cost data file are combined with the productivities to produce the cost volume cost at
15. columns in the Labor Rates worksheet for each labor type corresponding to the different cost bases or regions the user defined in the Source Data worksheet Each basis contains two columns The first column is used for descriptions where applicable and the second column contains the rate Equipment Operator and Truck Driver rates are categorized by the type of equipment Although the same rate may apply to all equipment models in an equipment category e g bulldozers the data file allows for different rates to be entered for each model Also the first column for each basis can be used to define a category or group of labor Laborers and Project Management and Technical Labor rates ate based on the specific job duties of the individual Laborers are assumed to be hourly employees with fringe benefit and zone adjustments similar to those for equipment operators and truck drivers Project management and technical labor employees are assumed to be professional employees and their labor rates should include all fringe benefits and zone adjustments as part of the hourly rate Each section also contains rows to document Fringe Benefit rates zone adjustments and the source of the data and or additional user comments Fringe Benefits include any additional employment costs such as medical and retirement plans and are input as an houtly cost Zone and Area Adjustments allow the user to define additional costs associated with different areas or zo
16. cost of backfilling liner removal and revegetation of process ponds requires limited information including the dimensions of the pond the methods and parameters for backfiling and placement of growth media and revegetation see Figure 23 Once the pond dimensions are entered in to the first table of the Process Pond module the volume is calculated using the formula shown on the worksheet and in Figure 1 If needed override cells are provided for both the Disturbed Area and Pond Volume Two methods of backfilling are provided dozers or a truck and loader fleet The cost of hauling backfill if a truck and loader option is selected uses the same cycle time and productivity calculations used for other material hauling activities e g cover or growth media placement Unless otherwise specified by the user the Model assumes that the pond will be completely backfilled 5 19 Version 1 12 ENTERING DATA 24 Process Ponds User Input You must fill in ALL green cells and relevant Mue cells in this section for each pond Pond Dimensions 1 E from Facility to Pond Pond Pond Sideslope calculated Percent Backfill Borrow cal y Length Width Depth Angle elsewhere Backfill Borrow Area els e m m m HAV ha 100 if blank m grade m I se sw IL es Description 26 required 32 1 All Pond Dimension and Backfill parameters must be input even if manual overrides for volume or area are used Proc
17. dependent on the available i information and the purpose for which the cost estimate is being Wes prepared Reclamation cost estimates for the purpose of providing i a surety estimate for regulatory purposes typically require the use of government approved rates Financial reporting requirements usually dictate the use of third party contractor rates as a base for equipment labor and material rates If the purpose of the cost estimate is for mine planning costs then actual mine costs or costs from an analogue mine could provide the most appropriate rate basis O Important Note Some regulatory jurisdictions such as the State of Nevada require the use of approved cost data Links to these data files can be found at www nvbond otg 3 1 Version 1 12 GATHERING YOUR DATA Regardless of the purpose of the cost estimate experience shows that most cost estimates require the use of data from a number of sources rather than a single one Some of the most common sources of rate data include e Government Publications Many governments publish cost data as part of government contracting procedures Often these comprise the data required for reclamation and closure cost estimates used for the putpose of determining the amount of regulatory surety required for a project In some jutisdictions government funded institutes also compile cost data from government contracts and the private sector These databases can be substantial an
18. or regulatory agencies responsible for reviewing and approving reclamation cost estimates for financial reporting or surety purposes The cost data cells in the user cost data file are unlocked to allow users to enter their own cost data e g mine costs Import Data from a Previous Model File As the Model evolves and new versions becomes available the user may need to update existing cost models by upgrading to a new version In Versions 1 1 and eatlier the only option is to manually add the number of facilities needed in each Module and then manually cut and paste the information from the old file to the new file TIP When performing a manual cut and paste operation be sure to use the Paste Special Values option from the Edit menu in Excel This will ensure that cell formats are not changed new import capability was added in Version 1 2 to aid in ease of transferring gt your data into the latest version of the Model To access the import routine the user needs to select the Import User Data option from the custom StdRecCost menu see Figure 35 This option allows the user to import data from some of the previous version into the latest version It does not work with all versions of the Model and will check to see if the file the selected import file is the proper version Window StdRecCost E Import Cost Data Figure 31 Import User Data Menu Important Note The import routine will behave va
19. required from that data e There is more than one way to prepare a cost estimate Although the Model provides a fairly simple method for estimating reclamation and closure costs it is not the only way to do so There are other tools and approaches to preparing closure cost estimates and some of these may be more suitable for a particular use or may be appropriate for use in combination with the Model e Results from Model are only as good as the plan and data used as a basis for the cost estimate There is nothing in the Model that can make up for an incomplete reclamation and closure plan It will not add things you left out It will not correct your input data That being said if used properly it can assist the user in finding gaps in their closure planning process and in certain circumstances may highlight data errors It can also be used in evaluating the relative costs of different reclamation and closure approaches to assist in the planning process e The Model is only a tool It cannot do your work for you and will only provide results based on your input Don t blame the tool if you don t like the results A poor workman blames his tools e There is no such thing as perfect software Although the process of beta testing the trial period and subsequent use by mine closure specialists has resulted in rigorous testing of typical uses for the Model Version 1 12 14 INTRODUCTION it also identified a number of needed changes i
20. Add Mobilization and Demobilization Costs The cost for mobilization and demobilization of equipment to a site is usually calculated separately and added to the total costs Typically mobilization costs are estimated for each piece of equipment that will be used for the closure work The cutrent versions of the Model do not include a standard calculation for mobilization of equipment but these costs can be estimated by the user in a User wotksheet or using an external model One such model is the 2007 mob demob xls Excel wotkbook available from the Nevada Division of Envitonmental Protection NDEP website http ndep nv gov bmrr cost htm Version 1 12 HOW DO I 4 In the current Model versions the user must manually determine the number of each type of equipment that must be mobilized To assist the user in this each of the main worksheets calculates and reports the number of each type of equipment that will be used for each line item By reviewing this information the user can determine the maximum number of cach type of equipment needed to perform the work documented in the Model In general the maximum number of pieces of each type equipment will represent the amount of equipment that will be mobilized However if activities requiring the same equipment will be performed simultaneously at different locations then the total pieces of equipment requiring mobilization should account for multiple fleets of the same equipment For e
21. DEX Add 5 3 6 6 backfilling 2 1 5 6 5 8 5 14 5 15 5 16 5 19 6 6 BLM 1 1 4 6 buildings 5 16 5 17 5 18 2 Buildings 5 16 5 17 CAD 1 2 3 4 CAT Handbook 2 4 2 5 2 8 1 Clear Sheet 5 3 Construction Management 5 25 5 26 correction factors 2 5 2 6 Cost Data 2 4 2 6 2 4 3 1 3 2 3 3 4 1 4 3 5 4 5 15 6 1 6 7 cover 2 3 5 7 5 9 5 12 5 13 5 15 5 16 5 17 5 19 6 4 6 5 6 6 7 cut and fill areas 2 2 2 3 cut to fill 2 2 2 3 5 6 Cyanide Code 6 6 2 Data File 3 2 3 3 4 1 4 2 4 3 5 5 Density 2 5 drill pads 5 5 5 7 drillhole 2 4 5 5 5 6 Equipment Costs 4 3 exploration drill roads 5 6 5 8 Fertilizers 6 6 fleets 2 8 3 2 5 5 5 15 5 16 footprint 2 3 3 4 5 9 5 11 5 17 6 4 Foundations 5 16 5 17 furstrum 2 1 GIS 1 2 3 4 Growth medium 3 Haul Material 5 14 5 15 5 16 6 4 6 5 6 6 Heap 2 3 5 2 5 9 5 10 6 4 heap leach 2 3 5 10 5 12 5 13 6 3 J ob Efficiency 2 5 1 2 lift 2 7 5 11 5 12 6 3 6 4 Manning s Equation 2 8 Means Heavy Construction 2 4 2 6 2 4 3 2 4 5 5 17 5 22 5 15 Means Heavy Construction Cost Estimating Guide 3 2 4 5 mid bench length 2 3 5 9 6 3 6 4 Misc Costs 5 21 5 22 5 32 6 6 Monitor wells 5 21 Monitoring 4 5 5 22 5 23 5 24 5 25 6 6 Mulch 6 6 NDEP 1 1 NVBond org 6 1 6 9 6 11 Operator Efficiency 2 5 1 2 override 5 2 5 6 5 14 5 16 5 18 5 19 product
22. Exercise 4 e How much of the existing safety berm bund needs to be replaced because it is inside the pit buffer 550 m e How much new safety berm bund need to be constructed 970 m TUTORIAL EXCERCISES Exercise 5 Roads This exercise uses a site map in back pocket to determine the length and width of several roads Use the large Training Exercise Area figure to fill in the blanks e How long is the road from the main access road intersection southeast of the ROM pad to the intersection at the southwest corner of the Area 4 WRD m e What is the average width of this road m e What is the slope of the natural ground over which this road traverses grade e How long is the road from the main access road to the mine camp m e What is the average width of this road m e What is the slope of the natural ground over which this road traverses grade B 12 TUTORIAL EXCERCISES Exercise 5 Answers Here are our answers for Exercise 5 How long is the road from the main access road intersection southeast of the ROM pad to the intersection at the southwest corner of the Area 4 WRD 2020 m What is the average width of this road 10 m What is the slope of the natural ground over which this road traverses 1 grade How long is the road from the main access road to the mine camp 675 m What is the average width of this road 10 m What is the slope of the natural ground over which this road traverses 1 grad
23. Standardized Reclamation User Manual Public Domain Version Standardized Reclamation Cost Model User Manual Version 1 12 Public Domain Version Disclaimer Use of the Standardized Reclamation Cost Estimator the Model is conditioned upon your acceptance of the terms and conditions set forth in the Model as they may be amended from time to time By opening and using the Model the use accepts these terms and conditions without limitation Prepared with the generous support of Ep E SRK Consulting Engineers and Scientists BARRICK Table of Contents Introduction oreet iras aus cuo i ava cu ou Ee ay au ERR Rue dus 1 1 PUrPose P 1 1 Background T 1 2 Model Validation bee ee 1 2 AAA usb 1 3 Things to Rememberuaucmuumansmainmameseessssvmvmmmnnadddnendue 1 3 Conventions Used In This Manual 1 5 How it Works circa en each 2 1 Volume Calculations 6 ccc2 ccce cce eee rae Ce eric ce 2 1 Surface Area Calculations eese 2 3 Equipment Productivities rrrnnnnnnnnvvvnnnnnnnnnnnnnnnnnvvnnnnnnnnnnnnnnnnnen 2 4 Miscellaneous Productivity Calculations 2 7 Dozing Distance Calculations sues 2 8 Cycle Times for Material Hauling Fleets 2 9 Fleet Producli
24. a contained in the file Units of Measure This is a user drop down field that selects whether the data contained in the file is in metric meters hectares etc or Imperial feet acres cubic yatds etc units It is critical that only one type of measurement be used in the Data File and that the units of measure used in the Data File match the units of measure that will be used in the Model No of Bases Regions This is an automatic field that determines how many different cost bases are contained in this Data File Excel determines how many different Basis Region Names the user enters in the Basis Region section at the bottom of this worksheet Basis Region Table This table contains three columns and fifteen rows used to define different cost bases for the data contained in this file The data in this table provides the descriptions for one to fifteen different cost bases or regions contained in the Data File Basis Region This is an automatic field that simply labels each basis or region used in the Data File Version 1 12 42 GATHERING YOUR DATA Basis Region Name This is a user input field containing the user s description of each cost basis or region This field might contain a description of the costs such as Third party contractor or Mine Costs or it could contain a description of the geographical area for which the data is valid such as Northern Nevada or Western Australia Basis Region Description This is
25. a user input field containing a longer description of the cost basis or region Because this field allows for word wrapping there is no programming restriction on how long a description can be input in this field Equipment Costs The Equipment Costs worksheet contains the different cost components required by the Model to calculate an hourly equipment rate for each type of equipment used in the Model There are fifteen columns for each type of data required corresponding to the different cost bases or regions the user defined in the Source Data worksheet Each section contains rows to document the source of the data and or additional user comments There are five sections to the Equipment Costs worksheet EN NOTE requiting user input These are The Equipment Costs wotksheet may contain Monthly Rental Basis This is a user input field that defines equipment that is not currently used in the the number of hours used to calculate the cost Correct data in Dee this field is critical as it will be used by the Model to determine worksheet in the Model the hourly costs by dividing the Monthly Equipment Rental Rate to determine what equipment is currently cost by the Monthly Rental Basis hours to determine the en hourly rental cost needs to input cost data in the Equipment Costs Monthly Equipment Rate Table This table contains the Worksheet for those i for diff d diff pieces of equipment monthly rental cost fo
26. abor and operating costs for each line item The Comments field allows the user to provide addition information for each line item e g the basis of the cost estimate or the Although the user can use the Or er Costs table in the Misc Costs module to include miscellaneous costs the Other User module carries each item included in this worksheet as a separate line item in the ARO LOM In addition the Cost Type cell for each item in the Other User module can be used to ensure that the each of the Other User costs are included in the correct section of the Summary Costs worksheet General and Administration incurred by the operator during closure but would not necessarily be incurred by a third party closing the site This distinction is important because that these costs are not included in the ARO costs see ARO LOM Scheduling unless the user overrides that default condition in the ARO LOM module 4 The general and administration G amp A module includes costs that would be The types of costs in the G amp A module include Property Holding Costs Security and Maintenance and Administration The options in this module allow the user to input a Type of cost the Frequency of the cost the Cost per Payment and the Number of Payments Human Resources requited during closure that may not be included automatically in the other modules For example if long term security or catetaking is required those costs can be included in this module T
27. actual work performed in the field and used to adjust the calculated numbers to reflect actual data Where the CAT Handbook was used several different approaches wete used If productivity curves were include in the Handbook tables in the Model see Table 1 were created based on those curves and then converted back to curves using the graphing functions in MS Excel From those graphs a trendline was fitted to each curve using built in Excel functions see Figure 5 The formula for each curve is then used in the calculation of equipment productivity for each situation where that equipment is specified by the user For example if a DYR dozer is used to push material 280 feet the formula used to calculate the productivity will be Productivity 89889 x 28099 Table 1 Dozer Productivity vs Grading Distance Dozer Productivity vs Grading Distance Production LCY hr Average Dozing Distance pee 39 07 007 ao 1000 oo 2800 1700 1250 1500 po 00550080075 ne CH 300 30 20 100 Source Caterpillar Performance Handbook Edition 35 dozer productivity k x Dozing Distance see graph 18508 e 091 2 5 Version 1 12 HOW IT WORKS Dozer Productivity Semi U Blade 3000 2500 2000 D11R m DIOR A DIR D8R e D7R LCY h 1500 1000 y 115087x100 QS 500 ed ga y 22719x 077 0 0 100 200 300 400 500 600 700 Dozing Di
28. ailable free of charge For more information on the NSUC Project please see the About SRCE page at the www nvbond org website Model Validation Initially the Model was validated in the State of Nevada U S A through an extensive alpha and beta testing process that lasted approximately 18 months This beta testing process was conducted by representatives from the mining industry and federal and state regulatory agencies Beta testers validated the accuracy of the majority of the Model calculations using manual methods civil CAD software GIS and other cost Version 1 12 INTRODUCTION estimating tools The volumetric calculations were found to be very accurate in comparison to other methods providing the project data was properly entered Productivity calculations were largely derived from published sources such as the Caterpillar Performance Handbook ed 35 and were compared against actual field conditions Although productivity calculations for specific tasks can be highly variable the beta testing period indicated that the overall time required to perform most tasks was within the range of data from actual projects or slightly conservative During the six month trial period following the beta testing process additional modifications were implemented as well as comparisons with actual field data from ongoing reclamation and closure projects Version 1 1 later revised to version 1 1 2 released in October 2006 incorporated a numbe
29. are selected an option is also provided to define the amount of volume loss occurs during the process The Model then increased the total material hauled to account for this loss prior to placement The Haul Material worksheet that can be used for a number of purposes including but not limited to e Pit backfilling e Multi layer covers with compacted and or crushed or screened layers e Hauling construction materials for various uses or e Transport of mine waste to new location For use in calculating pit backfiling costs this module allows the placement of additional cover and topsoil after backfilling If infiltration reduction is required then compaction of the backfill can be included by selecting Yes in the Compact After Placement cell This module has options to include costs for crushing screening and or compacting the primary material hauled If crushing or screening options are selected the user must also input the additional distance that the material will be hauled from the crushing screening plant Another option lets the user define the quantity of material delivered to the crusher screen that is lost due because it is either too small or two large for the intended use If compaction is selected the Model assumes that a vibratory roller will be used for compaction Costs for crushing screening and compaction are based on per volume costs included in the Misc Unit Cost worksheet Up to two additional layers can
30. ase be as specific as possible when describing Ihe problem 1 Whatis this report for i le 2 Please enter a brief one line description of the reported error example Dozer feet selection on Heaps page doesn t change cost grading cost e I there is a particular problem you are reporting please describe it clearly 4 Please provide us with the following information in case we need to contact you Your Name oar Figure 43 NVBond org Bug Report i i 6 11 Version 1 12 HOW DO I Make a Suggestion for Future Versions If you have a suggestion for future versions of the Model these can be submitted online through the NVBond org web site www nvbond org M RET Joo ete Baci tome Pieza bi u amem zer Use the form on this page to provide comments tell us your ideas for enhancing the model GEB lt ahna eise at comes to mna you are experiencing a problem wi g tug rep orm instead QE yore sssiance sing ne model checkout he cet Asked Questions page and the Manuals Tutorials page Nevada Standardized Unit Cost Project to assist us in future development planning Ez Information on bug reports and suggestions may be shared with the contributors to the However this information will not be shared with other parties or used for marketing am Your Name Your Email Address Category Choose Category Y am Subject Figure 44 NVBond org Suggestion Pa
31. available in the Metric Available in Nevada version only vetsion but some options EN SON Available in Metric Imperial version only not available in the Nevada SRK Bartick version only version Caterpillar Performance Handbook Edition 35 a CAT publication by Caterpillar Inc Peotia Illinois U S A October 2004 1 5 Version 1 12 Chapter How it Works The Model was developed to utilize a first principles approach to reclamation cost estimating to the best degree possible A basic understanding of the principles employed to calculate areas volumes productivities and time should help the user effectively use the Model approaches for volume and distance calculations and productivity estimation In some instances new approaches and software code were developed to implement and combine these standard methods into a single model that allows both consistency and flexibility T he methods of calculation used in the Model are based on first principle Volume Calculations Where possible the Model uses the simplest methods for volumetric estimation For example pond volumes are calculated based on the formula for the furstrum of a regular pyramid to determine pond mr volumes for backfilling calculations gt de and surface areas for liner installation see Figure 1 Where simple calculations are inadequate to fulfill the goals of simplicity of use and flexibility for site specific conditions th
32. cavation volume is either calculated based on dimensions input by the user or a volume input by the user in the Excavate Volume override cell see Figure 22 Version 1 12 5 18 ENTERING DATA 28 Diversion Ditches User Input Diversions Ditches Description Diversion Diversion calculated required ID Code Length Depth i elsewhere Material Fleet Seed Miz select select select Description PondiBerm required Pond Vidth Length Ezcavating Ezcavating Equipment Material 46 Description Material Material Type Fleet Type Seed Miz Mulch Fertilizer select select select select select select select North Dump Sediment Pond 08 Granite brok Medium c0miHDPE 1 Figure 22 Diversion Ditches amp Sediment Ponds Because the module assumes that bulldozers would be used to either construct or remove a sediment pond and the same basic calculations are requited to estimate volumes and work hours for either option this module can be used to estimate the cost of either removing or installing a sediment pond The Model currently assumes that sediment ponds will be constructed across a surface water drainage by pushing material with a bulldozer to create a berm The disturbed area dozing volume and cover volume calculations can be overridden by the user An option to install a 60mil HDPE liner in a sediment pond is available see Figure 22 Process Ponds Estimating the
33. clamation and closure B ecause the Model was designed to be simple to use the process of entering the Basic Data Entry The Model workbook is divided into different worksheets sheets Each contains information related to a particular type of facility or activity Generally the first two or three tables on each worksheet are for user input while the other tables contain the results of the Model calculations Cells formatted for user input are colored green cyan and yellow All other cells are locked and cannot be accessed by the user The only exception to this are the User sheets which are unlocked to allow user input and formatting to all cells Version 1 12 ENTERING DATA Green cells are formatted for direct input These cells are unlocked and can accept any type of input text numbers etc However the data entered will affect the resulting Description calculations and entry of an inappropriate data required type e g text vs number will cause errors in Dump 1 the calculations dependent on these cells um E Cyan cells contain drop down lists that allow the user to select from a list of valid Sag Dump Grading options Input of data other than the Material Equipment Slot Side by Type Heet Side options presented in the drop down lists select select select is not allowed in these cells Yellow cells ate used for direct user input that overrides calculated values f
34. costs are based on data included in the cost data file imported by the user If the materials are treated on site the costs include hauling to the treatment area and treatment assuming simple landfarming biotreatment techniques Closure of the treatment facility is not included in this module but can be added in the Yards Etc module Well Abandonment The Well Abandonment module provides options for closing cased wells or botings This module has been optimized based on the assumption that when abandoned wells must not be open to the sutface or have the potential to cross connect aquifers Two types of wells are included based on the well construction methods Production dewatering and infiltration wells assume that the casing is steel and that hydraulic seals are not included in the annular space except at the very top of the well Monitor wells may be constructed with steel or plastic casing but are assumed to have a hydraulic seal immediately above the screened section and the annular space above the seal is filled with low permeability materials such as bentonite grout or cement The thickness of the surface seal for the well and the minimum seal required above groundwater when grout is used are set by the user in the cells provided at the top of the worksheet see Figure 24 The productivity for the different well abandonment methods are based on actual field data from the State of Nevada USA provided by mine operators and drilling
35. d Moritor V Vell Clear Moritc MM cost for any activity for which labor equipment and material Well seal thick J 5 0 Minimum seal above andamos takle 20 0 n tates ate available The Fence Installation Fence Blank Removal Costs Culvert Removal Original Casing ati Grout Ce Static Below Casing Volume Vo Pipeline Removal costs and Rp Water Top of Depth to Length Volume per neh Level Pump Method 09 perm Holet9 H Rap and Rock Lining costs are all mbgs m m bgs select m m3 based on crews and crew productivities from Means Heavy Construction The labor and equipment rates for these are based on the cost data file imported by the user The Powerline and Substation Removal costs are estimated from unit costs included in the cost data file imported by the user Monitoring The Monitoring module includes options for reclamation monitoring and maintenance costs and ground and surface water monitoring These costs include labor and equipment for reclamation activities as well as labor costs for preparing annual reports Version 1 12 5 22 ENTERING DATA Reclamation Maintenance Maintenance costs for reseeding and erosion of topsoil are estimated based on the percent of surface area and topsoil volume respectively see Figure 25 The Model provides the total surface area and topsoil volumes and the user inputs the percent of each that is estimated to require maintenance during the cl
36. d have the advantage of tracking costs over time allowing the analysis of trends Commonly the final output from these institutional cost databases is a unit cost for each particular activity Because the Model does not generally use activity unit costs much of the data in these databases may not be usable as input to the Model However in many instances these data used to derive these costs including equipment and labor rates material costs fleets and productivities are also recorded or can be derived from the published information Published Cost Databases There are a number of commercial cost databases compiled from public and private sources available for purchase These databases may provide rate data for labor equipment and materials or unit cost data by activity If unit costs by activity are provided the resources labor equipment and materials required for each activity are often provided along with an estimate of the productivity of the assigned resources The resources crews and crew productivities from one of these databases Means Heavy Construction Cost Estimating Guide 2006 was used in the Model for some of the miscellaneous unit costs The Model then combines the crews and productivities with rate data to calculate a Model unit cost for each activity e Third Party Contractors One of the most accurate sources of cost data is a contractor s estimate Most financial reporting standards require the use of
37. d there is current public access to aetial photography at a usable resolution 3 5 Version 1 12 Chapter Setting Up Cost Data Files The cost data used by the Model must first be loaded into a specially formatted cost data file Model Standardized Data Files and User Data Files Standardized Data Files contain data that can only be modified with a password The data in User Data Files can be changed by anyone T here are two types of data files that can be used to load cost data into the e Standardized Data Files may be used by regulatory jurisdictions or corporate accounting departments to ensure that the Model uses a particular set of data dictated by regulatory or corporate standards e User Data Files allow the user to input their own data O Important Note Some regulatory jurisdictions such as the State of Nevada USA require the use of approved standardized cost data when the Model is used to calculate bond cost estimates required by regulations Links to these data files can be found at www nvbond org This user can input up to 15 different bases of cost in a single file which in turn allows the user to import a single data file into the Model but switch between bases regions For example if a single data file is constructed to contain all of the data for different regions of a country or state then the user would only need a single User Data File to load cost data for any operation within that country or state
38. e B 13 TUTORIAL EXCERCISES Exercise 6 Ponds This exercise uses a site map in back pocket to determine dimensions of ponds Use the large Training Exercise Area figure to fill in the blanks e What are the dimensions of Pond 1 width m length m depth 5 m e Pond 1 sideslope angle 2H 1V e What are the dimensions of Pond 2 width m length m depth 5 m e Pond Z2 sideslope angle 2H 1V e What are the dimensions of Pond 10 width ___m length m depth 5 m e Pond 10 sideslope angle 2H 1V B 14 TUTORIAL EXCERCISES Exercise 6 Answers Here are our answers for Exercise 6 e What are the dimensions of Pond 1 width 55 _ m length 55 m depth 5 m e Pond 1 sideslope angle 2H 1V e What are the dimensions of Pond 2 width 55 _ m length 55 _ m depth 5 m e Pond 2 sideslope angle 2H 1V e What are the dimensions of Pond 10 width 68 _ m length 70 _ m depth 5 m e Pond 10 sideslope angle 2H 1V B 15 TUTORIAL EXCERCISES Exercise 7 Exploration Roads This exercise uses an example of a two cell tailings impoundment with different embankments heights Use the figure for Exercise 7 to fill in the blanks e No of Drill Sites e Avg Pad Width 15 m e Avg Length 20 m e Avg Sump Dimensions 7L x 3W x 2D e Length of Road 610 m e Width of Road 5 m e Slope Y grade e Cut Slope Angle 70 deg e Fill Slope Angle 1 3H 1V B 16 TUTORIAL EXCERCISES Exercise 7 Explora
39. e Truck Cycle Time Maneuver to Load Time Truck Loading Time Maneuver to Dump Time Total Truck Travel Time Number of Trucks Required Truck Cycle Time Truck Loading Time Truck Loading Time rounded up to nearest integer Truck Productivity 60 min hr Total Cycle Time x Avg Truck Capacity Fleet Productivity Number of Trucks Required x Truck Productivity x Haul Operator Efficiency x Job Efficiency Work Hours Total Volume to be Hauled Fleet Productivity Conservative assumptions Average Loader Capacity is used for Number of Passes to Fill Truck Average Truck Capacity is used to calculate Truck Productivity even though cycle time is calculated based on Heaped Capacity of Truck GLOSSARY Average Haul Operator Efficiency factor 1 0 is applied to trucks in Nevada SRCE can be adjusted in International SRCE Job Efficiency of 50min hr in Nevada SRCE can be adjusted in International SRCE A 2 Appendix B Tutorial Exercises TUTORIAL EXCERCISES Exercise 1 Simple Waste Rock Dump This exercise uses an example of a single lift waste rock dump with a consistent height The first step is to determine what the closure plan for the dump is What does it say about the following Regrading Cover Topsoil Ripping Seeding The next step is to determine the key geometric parameters that the Model needs to perform the volumetric and area calculations Use the map for Exercise 1 to fill in the blanks below Du
40. e superintendent transpe office power water and similar items pense of such items as trailer porary heat testing temporary Maintenance the preservation of the functional integrity and efficiency of the equipment and structures of a mine closure project and includes without limitation any necessaty preventive maintenance corrective maintenance and replacement of equipment or structures Maintenance and repair cost the total of labor material and other related costs incutred in conducting corrective and preventative maintenance and repair on a facility on its systems and components or on both Maintenance does not usually include those items that cannot be expended within the year purchased Such items must be considered as fixed capital Map Area see Footptint area MCP see Mine Closure Plan Meteoric waters any form of precipitation falling from the earth s atmosphere G 3 Version 1 12 GLOSSARY mg L means the concentration of a substance in milligrams present in one liter of the water Milestone an important or critical event and or activity that must occur when scheduled in the project cycle in order to achieve the project objective s Mine Closure Plan MCP a plan prepared in accordance with applicable regulations corporate requirements or international standards that describes the objectives actions and success criteria necessary to close a mine or portion thereof Mining means t
41. e Model uses combinations of basic formulae or Visual Basic VBA code to estimate volumes Area and Volume of the Frustrum of a Pyramid Surface Area ab cd a b c d x e 2 Volume h ab M vabcd Figure 1 Furstrum of a Pyramid 2 1 Version 1 12 HOW IT WORKS In the case of the calculation of slope regrading volumes creation of a new VBA code was necessitated because the Model needed to calculate volumes for situations where the fill material would be pushed downhill at the toe of the dump see Figure 2 a and situations where the material would be pushed into an opposing hillside see Figure 2 b In both instances the Model uses a VBA routine to calculate a series of cross sectional cut and fill areas designated by A and A respectively using the parameters shown on Ungraded i original dump slope Underlying p original ground slope Underlying original ground slope Ungraded original dump slope S Top Slope Au muU Cut to Fill pivot point optimized 41 Su Ungraded slope So Original slope at Sr Final slope gt dd b Figure 3 until A Az By using this VBA routine the Model determines the exact dimensions necessary for a balanced cut to fill Figure 2 Regrading Volume a Uphill and b Downhill Version 1 12 HOW IT WORKS Sr Top Slope h Lift Height Cut to Fill pivot point opt
42. e and unit cost of the energy The forced evaporation option also includes an option for the user to define a required pressure at the end of the pipe Version 1 12 HOW IT WORKS Ibid Means Heavy Construction Cost Data 2006 Reed Construction Data RSMeans Kingston MA Copyright O 2006 gt Ibid Version 1 12 2 10 Chapter Gathering Your Data The Model was designed to allow a variety of input methods while ensuring that the simplest methods would still produce accurate results determined by two primary factors the minimum data required by the Model to calculate costs and the intended purpose of the cost estimate The Model requirements dictate the minimum data necessary to produce a usable cost estimate The intended purpose will define the level of detail of the input data T he data required to perform a reclamation cost estimate using the Model is The Model requires the user to provide two types of data cost data and project data Cost data include the equipment labor and material rates required to perform the reclamation and closure activities Project data are the dimensions methods and design criteria used to define the closute plan for the facilities Cost Data The cost data required as input to the Model can be obtained from a number of sources and comprise the underlying rate assumptions used in the cost estimation process The particular cost data I required for any estimate will be
43. e for the Manufactute Transport and Use of Cyanide in the Production of Gold Cyanide Code is a voluntary industry program for the gold mining industry to promote responsible management of cyanide used in gold mining enhance the protection of human health and reduce the potential for environmental impacts www cyanidecode org Deterministic cost estimating methodology a cost estimating method in which the independent variable s are more or less a definitive measure of the item being estimated deterministic methodology is not subject to significant conjecture AACE International 2003 Facility all portions of a mining operation including but not limited to the mine waste rock piles or piles beneficiation process components processed ore disposal sites and all associated buildings and structures Field supervision the cost of salaties and wages of all field supervisory and field support staff personnel excluding general foreman plus associated payroll burdens home office overhead living and travel allowances and field office operating costs Fixed cost those costs independent of short term variations in output of the system under consideration Includes such costs as maintenance plant overhead and administrative selling and research expense For the purpose of cash flow calculation depreciation is excluded except in income tax calculations Fluid any material or substance which flows or moves wh
44. e sections for disposal of solid hazardous and hydrocarbon wastes The options for each type of waste are based on typical disposal methods Solid Waste Two options exist for Solid Waste disposal on site and off site On site disposal assumes that the waste will be loaded and hauled to an on site landfill The closure of the landfill should be included in the Landfills module If solid waste is hauled from the site the Model assumes that roll off containers will be used The rental rates and Version 1 12 5 20 ENTERING DATA haulage costs for off site disposal are based on unit costs included in the cost data file imported by the user Hazardous Waste For the purposes of the Model hazardous waste is any waste material requiring special handing transportation or disposal The Hazardons Waste tables assume that hazardous waste will be removed from the site The method of packaging and transporting is dependent on the type and quantity of waste Options for both liquid and solid hazardous wastes are included The transport and disposal costs for hazardous waste are based on unit costs included in the cost data file imported by the user Testing of unknown materials is not included but can be included using the Other Costs option in the Misc Costs module Hydrocarbon Contaminated Soils Methods for disposal of Hydrocarbon Contaminated Soils include off site disposal and on site treatment If the material is hauled off site the unit
45. e source of the costs you have just entered These costs will then be available in the blue dropdown list in the appropriate cells throughout the Model Version 1 12 HOW DO I uu 81 Monitoring Costs 82 Description Units Cost unit 63 84 Monitor Well Pump et cen 52 140 00 85 Sampling Supplies gcc 5 00 86 87 Water Analysis Profile I 1 ea 300 00 88 Leach Test MWMP w analysis ea 370 00 89 ABA S speciation 90 WAD Cyanide in water 91 Water Analysis Profile Il 1 102 WAD Cyanide Gr 103 i 104 Figure 36 Example of User Cost Data 106 aw ge e gt e gt Ss 112 1 WET Labs Reno Nevada 7 2006 Get the StdRecCost Menu Back If you open more than one copy of the model at a time and then close one the StdRecCost menu option at the top of the Excel screen will disappear Version 1 2 has a Tools sheet with a macro button that resets the menu see Figure 41 To activate the Tools sheet press Ctrl Shift T from within the Model file STANDARDIZED RECLAMATION COST ESTIMATOR User Tools Version 1 2 0 Beta4 These tools allow easy access to some useful VBA routines and macros that are include in this Model Version Reset Manus This option resets the StdRecCost Menu in case it gets removed from the tool bar w He lade Keyboard Shortcuts ker 4 pees liel ilil ji 2 He
46. ea rates for demolition These productivities crews and rates are shown on the Misc Unit Costs worksheet The user input required by this module includes the dimensions of the buildings the type of building construction the heights and thicknesses of the walls concrete slab demolition method the building area including surrounding areas such as parking lots associated with the buildings and the thickness of cover and topsoil for the areas Input such as dimensions wall thicknesses and cover and topsoil parameters are input as number directly in to the first user data table in the module Information such as the type of building and wall construction and slab demolition method are selected from a list of available options The building types are based on the building types included in the demolition section of Means Heavy Construction When entering the Building Area Footprint areas surrounding and associated with the buildings can be included see Figure 21 The Model uses this footprint area when calculating the cost of placing cover and growth media scarifying and revegetation for the building Another method to account for these areas is to include these areas in the Yards module Building Areas Building Foundations Figure 21 Buildings and Foundations 5 17 Version 1 12 ENTERING DATA If the Break and Bury option is selected as the slab demolition method the Model assumes that an excavator equipped with a hydraulic
47. ed into the facility worksheet and the Haul Material worksheet so that you do not duplicate costs e g scarifying ripping which may only need to performed once Incorporate Cyanide Code Compliance Compliance with the Cyanide Code requires that a closure cost estimate addressed all activities necessary to properly decontaminate and decommission process facilities that have come into contact with cyanide solutions during operations Most of these activities ate covered in the main modules of the Model Others may require the use of the Misc Costs Other User or User Sheets The Solution Mgmt Sheet also contains useful options for Cyanide Code compliance The Pumping of water Forced Evaporation for disposal of water Water Treatment and Decontamination options in this module provide a method to facility Cyanide Code compliance with the Model Calculate Pit Backfilling In Version 1 1 1 the best method to estimate the cost of pit backfilling is at use the backfill option in the Process Ponds module to estimate the load haul place cost for backfilling a pit In later versions Pit backfilling is best handled in the Haul Materials worksheet in the Model For use in calculating pit backfiling costs this module allows the placement of additional cover and topsoil after backfilling If infiltration reduction is required then compaction of the backfill can be included by selecting Yes in the Compact After Placement cell
48. er the Model requires slightly different user input for each of the facility types to calculate closure costs and allows a great deal of flexibility in how the cost estimate for each facility is approached Property Information The Property Information worksheet contains information describing the property the cost data basis and the units of measure This worksheet NOTE has a combination of direct user entry option buttons and Ifthe Ma es d is drop down user selections It also contains information on 20 PProved OF BETTE State of Nevada USA then a the last data file imported into the Model The File Name message will appear at the top Date Cost Data Type Standardized or User Units of Measure s the d Information see Figure 11 Version 1 12 54 ENTERING DATA and Author Source of the last Data File imported into the Model are shown at the top of the page The bottom of the page contains information on the project and the cost estimate including the Project Name and Date Units of Measure Type of Project small exploration large exploration or mine operation Land Status Private Public or Public Private and the selected Cost Basis see Chapter 4 Setting Up Cost Data Files For projects in the USA the three project types shown on the Property Information worksheet determine which indirect costs are automatically included on the Cost Summary worksheet The user can also override these selections if appropriate
49. ermine the production rates for casing removal casing perforation and grouting Productivities for demolition and other miscellaneous tasks are estimated from information contained in and used by permission from Means Heavy Construction Cost Data 2006 Means As an example wall demolition productivities and crews from Means are combined with the equipment and labor cost data imported into the Model to calculate a unit cost for each wall type see Figure 6 2 7 Version 1 12 HOW IT WORKS Daily Crew Output Means Number Total Notes Unit Materials Labor Equipment Premium Wall Demolition Block 4 thick 02220 130 2000 S g 7 assumes vertical reinforcing rods included 20 premium Block 6 thick 02220130040 S F 1Clab 170 4 7 assumes vertical reinforcing rods included 20 premium Block 8 thick 0222031302080 S F 1Clab 150 E yA 21 assumes vertical reinforcing rods included 20 premium Block 12 thick 02220 130 2100 S F 1Clab 150 i yA 21 assumes vertical reinforcing rods included 20 premium Conc 6 thick 02220 130 2400 S F B 9 160 assumes average reinforcing 10 premium Conc 8 thick 022201302420 SF assumes average reinforcing 10 premium Cone 10 thick 02220 130 2440 S F assumes average reinforcing 10 premium Conc 12 thick 02220 130 2500 S Y assumes average reinforcing 10 premium
50. es The Model is distributed without any rows facilities in any of the worksheets To add new facilities to a worksheet press the Add button at the top of the worksheet On some sheets containing multiple facility types the buttons may be at the right of the table After selecting the Add function a dialogue box will appear asking how many facilities you wish to add If there are already facilities on the worksheet then a second dialogue box will appear asking the user to select the row above which the new facilities should be added If the user selects add to end then the new facilities will be added to the bottom of the table s After the user selects Yes Continue the Model will add the requested rows to all of the tables in the work worksheet Selecting No Cancel on any dialogue box will cancel the action without adding any new facilities Add Dump Clear Sheet Delete Dump Page 1 irect Input own Selection en ess Do you really want to add this Formula or Reference facility ou must fill in ALL green cells and relevant b Physical Eee 3 Cover lower layer Distance Slope F Cover Final Final Top Lift dump Yes Continue No Cancel Thickness from from Cover Dump to Slope Height e Flat Areas Grade i Borrow Cover Borrow Thi t ors yy pm in po 9 7230 5000 20 pm 1 ft grade olume or area are used Figure 9 Adding Facilities Clearing User Data fr
51. ess Ponds User Input cont Backfill Growth Media Revegetation Growth Media Crew Backfill Backfill Media Placement Cut amp Fold Material Equipment Material Equipment Time Type Fleet Type Fleet Seed Miz Mulch Fertilizer hrs select select select select select select select AMA ee ee ee Figure 23 Process Pond User Input Description required The cost of cutting and folding a pond liner is based in the Crew Cut amp Fold Time parameter input by the user and assumes that two laborers and a small excavator with operator comprise the removal crew Landfills The Landfills module provides a method for calculating the cost of reclaiming landfills associated with solid waste disposal including construction debris This module is nearly identical to the Waste Rock Dumps module except that it does not calculate a regrade volume and assumes a flat area The user must enter a regrade volume and a disturbance area for the cost calculations to work properly Yards Etc The Yards Etc module was designed to allow the user to include reclamation costs for miscellaneous disturbance areas such as ready lines laydown yards disturbed areas unrelated to another facility and facilities such as parking areas not associated with a particular building This module is essentially identical to the Landfills module and requires the same user input Waste Disposal The Waste Disposal module has three separat
52. ether in a semisolid liquid sludge gaseous or other form ot state Fluid management system that portion of a facility which has been constructed to contain or transport process fluids Footprint area the area resulting from a horizontal projection of a facility Frustum of a Pyramid The portion of a pyramid that lies between the base and a plane cutting through it parallel to the base Groundwater all subsurface water comptising the zone of saturation including perched zones of saturation which could produce usable water Version 1 12 G 2 GLOSSARY Growth medium a material which is capable of supporting vegetation Hazardous Material Hazardous Waste any waste material requiring special handing transportation or disposal methods as proscribed by regulation or statue Home office cost those necessary costs involved in the conduct of everyday business which can be directly assigned to specific projects processes or end products such as engineering procurement expediting legal fees auditor fees inspection estimating cost conttol taxes travel reproduction communications etc Infiltration the entry of water or fluid into the ground through such means as infiltration basis septic systems or infiltration trenches Injection well a well used for the subsurface emplacement of fluids except fluids associated with active drilling Job overhead or Project management cos toilets telephon
53. ets are assumed to be limited by the cycle time of the loading equipment Le loader limited and the number of hauling units is determined by the loading cycle This means that a truck fleet size is determined cycle time of the loader and the loader is assumed to never be idle For example if the time required by a truck to make a round trip is slightly more than twice the loader cycle time then the Model will assume that three trucks are required with two traveling and one being loaded at all times The overall fleet productivity and work hours are therefore based on the loader productivity The total cost for hauling is then calculated by multiplying labor and equipment rates by the number pieces of equipment in the fleet including the loader trucks and spreading dozer Dozer loaded scraper fleets are assumed to be dozer limited and the cycle times and fleet sizes are determined on that basis Solution Management The solution pumping forced evaporation and decontamination tables included in the Solution Management module include cost calculations for pumping water from one location to another using Manning s Equation and other standard hydraulic formulae This module uses these formulae to estimate the energy kW required to pump solution a defined distance with a hydraulic head through a pipe of a known diameter and material Once the energy required is known the cost of pumping that water can be calculated by applying the total pumping tim
54. ffect the accuracy of the cost calculation the minimum data required is all that the user enters Because the Model does not limit the user to using a single line item for each waste rock dump and heap leach a complex dump can be subdivided into sections to increase the overall accutacy of the Model calculations for the facility An example waste rock dump is shown in Figure 17 This dump comprises two separate lifts with an irregular footprint and varying lift heights It has also been partially reclaimed and the current slope angles on the bottom lift are at their final configuration After reviewing the current dump configuration the user can see that the dump can be better represented in the Model if it is divided into four areas based on the height of the lifts and the underlying ground slope the upper lift has an underlying slope of zero because it is located on top of the lower lift Areas 1 and 2 represent the upper lift and are separated primarily because of the different height of the lift in those two areas Areas 3 and 4 have different lift heights as well but also have different existing slope angles with the entire slope of Area 4 having been regraded to the final slope Using these divisions the dump can now be broken into four sections each input into separate line in the Waste Rock Dump module see Figure 18 Version 1 12 5 10 ENTERING DATA II Upper Lift Slope t X 1544 Lower Lift Top ae 2007 DigitalGlobe
55. ge SE please enter the displayed characters EQ IET Version 1 12 6 12 Glossary Version 1 12 GLOSSARY Administrative expense the overhead cost due to the nonprofit specific operations of a company Generally includes top management salaties and the costs of legal central purchasing traffic accounting and other staff functions and their expenses for travel and accommodations The Angle of Repose The maximum slope or angle at which loose cohesionless material remains stable Asset Retirement Obligation ARO An ARO estimate is the fair value of abandonment liabilities associated with mining and mineral processing operations for financial reporting purposes In other words it is the amount a mining company would pay a third party to assume responsibility for completing all closure activities including a reasonable profit margin ARO cost estimates are be prepared each year as part of the annual financial reporting requirements of some stock markets and adjusted to reflect any increases due to new development work or reductions resulting from completed closure work that occurred in the financial reporting year ARO see Asset Retirement Obligation Aquifer a geological formation group of formations or part of a formation capable of yielding a significant amount of water to a well or spring Backfill the material used to refill an excavation Basis Documentation that describes how an estimate sc
56. graded slope ui Fill gt wi Y gt So Original slope _ lt gq Sr Final slope p UTE b Figure 3 Final Disturbance Area user input footprint of resloped facility Final Slope Surface Area Mid Bench Length x Final Slope Length Final Slope Footprint Area Horizontal Distance between Final Crest and Final Toe x Mid Bench Length Final Flat Area Total Final Disturbance Area Final Slope Footprint Area Final Surface Area Final Slope Area Final Flat Footprint Area see Figure 4 Where facilities are assumed to be flat e g yards tailings impoundment surfaces landfill surfaces building foundations the Model assumes that surface area footprint area Final Dump Slope Footprint Area gt Final Dump Flat Footprint Area gt Original Dump Slope at mM Footprint Area o gt Dump Flat Footprint Area Final Surface Area B Figure 4 Surface Area Calculations Equipment Productivities The Model uses several different sources and methods for calculating equipment productivities The primary source is the Caterpillar Performance Handbook CAT Version 1 12 24 HOW IT WORKS Handbook Other sources include the Means Heavy Construction Cost Data 2006 equipment and material suppliers and local contractors In some instances such as exploration roads and drillhole and well abandonment productivity data was collated from
57. hammer will be used to break the slab before burying Other Demolition and Equipment Removal The Other Demo amp Equipment Removal module provides another option for the user to include the cost of demolition and removal of buildings structures and equipment that does not require the input of building or atea dimensions This module TIP By entering formulae in the labor and equipment unit cost cells linking these cells to fleet unit hourly costs for an appropriate fleet in the Fleets module these costs will be automatically updated as new equipment and labor rates become available is intended to be used with external calculations or experience regarding the cost of or time required for demolition or equipment removal activities The user must enter data into the Location Quantity and various unit cost fields on each line for the Model to estimate costs for these activities Diversion Ditches and Sediment Ponds The Sediment amp Drainage Control module is intended to calculate the cost of instaling diversion ditches and instaling or removing sediment ponds Diversion ditches ate assumed to have a trapezoidal cross section and be constructed using an TIP The Buildings and Foundations module can be used to estimate the cost of tank demolition Enter the tank diameter in both the length and width columns and select a steel building type This will slightly overestimate the volume but not significantly excavator The ex
58. hanges that may occur trem one Versi Model version to the next the format of the cost data files may also fines change This i oN For use wif Version 1 1 or 1 1 1 of the model you need to use a version 14 cost deta file Tha standardized Nevada cost data eost data std nv2006 xls can be downloaded at tha NDEP website For a user editable version 1 4 cost deta file goto the Dowrnloadi page on this site What is desta do Version 1 12 HOW DO I You can also look under Known Issues for anything that has been found to be an issue in the Model a jinis aeoo sees Get hoar Ga i Test e 4 Fome yae gt on pite S seme Bk prr Net All Module Fite Modu A Sediment Exploration amp Well Abandonment Modules DrlIhols phapging costs do not calculate correct when multipla holes are open at one tma for Exploration Diaes Eeplattion ee Marker Wee el Aban dsrman unche eo This problem ocoon aue lo fhe rama hour cakton li occa when em Hiwale pagg rs in fun I and Wei Aban the nog 2 yo actor a rib greats trar un he Maw Hi Open at One Tim Protest int Tir ets ours 10 pg al att neles os grader Man J heus hen me m de INCA gres tre moy 2 hour req aner 1 hr move o Joven Tht pase ba Tine han une Dale is open et one Lowe be odel shouid One fee de 2 hows pot ro and I not UB numos of hls 2 2 Tou ag 25 Pokus BU AHO SUT 59 alan ho User Data LacorZces Tm wallow ned n ho it Pie Exploret
59. he process of extracting ores from the earth Mitigation means by which an environmental impact is avoided or minimized and may include 1 Avoiding an environmental impact by not taking a certain action or parts of an action 2 Minimizing an environmental impact by limiting the degree or magnitude of the action and its implementation 3 Rectifying an environmental impact by repairing rehabilitating or restoring the part of the environment affected 4 Reducing or eliminating an environmental impact over time by preservation and maintenance during the life of the action 5 Compensating for an environmental impact by replacing or providing substitute resources or environments Operating cost the expenses incutred during the normal operation of a facility or component including labor materials utilities and other related costs Includes all fuel lubricants and normally scheduled part changes in order to keep a subsystem system particular item or entire project functioning Operating costs may also include general building maintenance cleaning services taxes and similar items Performance bond a bond that guarantees the work will be completed in accordance with the contract documents The bond also assures the owner that the contractor will fulfill all contractual and financial obligations Permanent closure the time in the operating life of a facility when activities for the final stabilization removal or mi
60. he user can enter different job groups and vary the number of employees by the closure year The closute years shown in these tables correspond to the Closure Year 1 included in the ARO LOM module and are p The Human Resources module allows the user to include additional staff Version 1 12 5 28 ENTERING DATA automatically scheduled into that module based on the information provided in this module User Sheets There are twenty User Sheets at the end of the Model that can be used to perform any additional calculations needed to estimate closure costs A standard header has been entered into each of these sheets containing basic project data The cells in these sheets are unlocked and can contain enter any standard Excel data type or formula For example these sheets could be used to provide a mobilization cost or detailed calculations entered in the Ober Costs table in the Misc Costs module Means Heavy Construction Cost Data 2006 Reed Construction Data RSMeans Kingston MA Copyright 2006 Ibid 2006 International Cyanide Management Institute 1200 G Street NW Suite 800 Washington DC 20005 USA 5 29 Version 1 12 Chapter How do 1 Although the Model mas designed to provide a standardized approach to reclamation and closure cost estimating unique requirements of specific projects offen require the use of different approaches to using the Model estimate with the Model However many projects have
61. hedule or other plan component was developed and defines the information used in support of development A basis document commonly includes but is not limited to a description of the scope included methodologies used references and defining deliverables used assumptions and exclusions made clarifications adjustments and some indication of the level of uncertainty Berm a mound or wall of earth rock ot sand Best practices measures methods of operation or practices which are reasonably designed to prevent eliminate or reduce water pollution from diffuse sources and which are consistent with the best practices in the particular field under the conditions applicable This term is intended to be equivalent to the term best management practices Best Management Practices BMP see Best Practices Bund see Berm Chemically Stabilized means the condition which results when contaminants in a material are bound or contained so as to prevent them from degrading the waters of Version 1 12 GLOSSARY the State under the environmental conditions that may reasonably be expected to exist at a site Closure Completion the time when a closed mine progressed to a state where mining lease ownership can be surrendered relinquished and responsibility accepted by the next land user Department of Industry Tourism and Resources 2006 Mine completion aims to ibid Cyanide Code The The International Cyanide Management Cod
62. icular to the pit rim and berm to create a berm from the pushed material The average push length assumed to be approximately 33m 100ft Dozer The Nevada version only allows the user one berm construction option D Dozer Revegetation of the berms uses the same options as all other facility types Ripping the berm is not included as an option Version 1 12 5 14 ENTERING DATA Underground Openings The Underground Openings worksheet includes options for closing both vertical shaft and horizontal adit subhorizontal decline openings to underground workings Generally closute methods allowed involve construction of barriers or backfilling Productivities for adit plugs barricades and bat gates are calculated from actual work recorded in the western U S Backfill productivities are based on material hauling costs with special small fleets and have been generally validated with actual work in the western U S The productivity and material costs for construction of a reinforced concrete shaft cap were adopted from Means Adits Closure of adits assumes that a barricade gate or backfill is required Barricades are assumed to be concrete walls with or without rock backfill from the barricade to the opening Gates designed to allow egress and ingress of bats may be appropriate for certain situations Backfill may be the primary closure method or used in conjunction with a barricade Options for backfill inc
63. ilings impoundment separately see Figure 19 The embankment is treated in a manner similar to that of waste rock dump and heap leach slopes The tailings surface is addressed separately as a near horizontal irregular surface The Model has options for regrading cover and revegetation for both areas of an impoundment Tailings Surface includes embankment crest if no embankment regrading Embankment Slope Figure 19 Tailings Impoundments some of the calculations used to calculate the costs for waste rock dumps and heap leach pads In particular the inputs required and calculations performed to estimate the cost to regrade a tailings embankment are the same as needed to L In estimating the closure costs for tailings impoundments the Model uses Version 1 12 5 12 ENTERING DATA estimate the cost to regrade a waste rock dump or heap leach pad see Figure 20 As with waste rock dumps if the embankment has been constructed in a manner that facilitates regraded by raises then the cost to reclaim each raise can be estimated separately Embankment height Il sl l h La Gverelbslapelongine cos Overall slope angle Embankment Height Original Ground Slope Figure 20 Tailings Embankment Parameters Many tailings embankments are constructed at their final configuration and may only require final cover placement and revegetation s noted in Chapter 2 in order for the Model to calculate the surface area of a facil
64. imized C Fill So Original slope _ ad Sr Final slope f br p Figure 3 Slope Regrading Cross Sectional Area Calculation Once the cross sectional cut and fill areas are determined the Model estimates the cut to fill volume by the formula A x mid bench length The mid bench length is a user input representing the distance of a line along the contour of the slope approximately 2 the way up the slope This slope regrading volume estimation method is used in the Waste Rock Dumps Heap Leach and Tailing Impoundment modules The Model also uses a similar method to estimate cut to fill volumes for road recontouting but recognizes that the fill volume requiring placement back in the cut will have expanded during excavation To account for this the Model applies a 20 swell factor to the cut volume by the formula A x 1 2 Az Surface Area Calculations All calculations in the Model used to determine the quantity of seeded area and the volume of cover material are based on true surface areas rather than footprint areas The surface area on non planar facilities e g waste rock dumps heap leach pads etc is estimated from the results of the cut to fill volume VBA routines as follows 2 3 Version 1 12 HOW IT WORKS Final Slope Length Final Slope of Fill c Final Slope of Cut c see Sr Top Slope h Lift Height p E ue Cut to Fill pivot point optimized gt Ci Pr A1 Su Un
65. ingle line with a single lift height and the total mid bench length Final regraded Dump Footprint ERUNT 3 Dump Footprint Mid bench 2 Mid b nch 1 Figure 32 Multi Lift Slope Inputs additive 6 3 Version 1 12 HOW DO I Multi lift separate A dump with different lift heights or on steep ground will need to be entered as a multi lift separate dump In this situation you need to treat each lift separately in the Model You will need to determine the mid bench length and the footprint associated with each lift or area see Figure 37 The best method to do this is to start with the top lift and determine the final footprint area and other input for that lift Then using the toe of the final footprint of the top lift as the upper bound of the footprint for the next lift repeat the process until you have included all of the lifts Bottom Lift Final Footprint ie 3 Middle Lift Final Footprint Final regraded Dump Footprint Dump Footprint Mid bench 2 Top Lift Final Mid bench 1 Footprint Figure 33 Multi Lift Slope Inputs Separate Another example of a complex waste rock dump is given in Chapter 5 and shown on Figure 17 The decision on the approach taken and how much detail is appropriate entering the data for each dump will be site and facility specific and highly dependent on the information available and the level of accuracy required from the cost estimate
66. io Workaround Eres each holt Pat ed ba ocon or separate ue Seventy mo Error Mesi Se v messe very aner nest ange nubes easiest on Nos avs if open at one bre Exploratic o Sediment AR Modules When User Mix 6 is velested as the seed mix revegetation material costs are not calculated Expleratio Trios prstem xar dae to frs Hec fra fue rar gue used fu mich Cw cose vi Uwe gard ed I fui n wur occurs when ter Mix i selected ven though materal coit is shown fy fis weed mis cn fie Matonat Coss med m Uc ur roar ess E Figure 42 Known Issues Page Report a Model Bug If you find a bug in the Model it can be reported on the NVBond org web site www nvbond org by filling out and submitting a web based Bug repott SCHE a omen oto pes md org urene tr O re Bach oro Die T you re experiencing a problem wih e SRCE Model please NI out and submit ihe hug sporl form You may also want to check out the known issues For suggestions or requests for improvements please use our suggestion form information on bug reports may be shared with the contributors to the Nevada Standardized Unit Cost Project fo assist us in future der planning However this information wil not be shared wih other parties or used for marketing s Bug Report Form When you submit your service request report it wil be entered into our for traciong purposes BI TE ae the Kngw Issues page and tips or Ple
67. ion wells 5 22 Productivity 1 3 2 4 2 5 2 6 5 1 regions 4 1 4 2 4 3 4 4 4 5 Rental Rate 4 3 Revegetation 4 5 5 14 5 23 6 5 6 6 6 Road Maintenance 5 25 5 26 SRCE 1 1 1 2 surface area 2 3 5 7 5 9 5 13 5 23 6 5 tailings 2 3 5 12 5 13 5 trenches 5 5 5 6 3 User Sheets 4 5 5 32 6 6 waste rock dump 5 10 5 11 5 12 5 13 6 3 6 4 wells 2 6 5 21 5 22 Version 1 12 References Version 1 12 REFERENCES R 1 Appendix A Technical Reference TECHNICAL REFERENCE Truck Loader Fleet Productivity Calculations Version 1 3 Truck and Loader Capacities from CAT Handbook see Productivity worksheet Average Capacity of Loader Struck Bucket Capacity v Heaped Bucket Capacity Struck Bucket Capacity Loader Cycle Time from CAT Handbook see Productivity worksheet Haul Operator Efficiency 0 75 Average Job Efficiency 0 83 50min hr Number of Passes to Fill Truck Heaped Capacity of Truck Average Capacity of Loader heaped truck capacity used because that his how trucks are loaded by a FEL i e they keep loading until material spills out of bed of truck Truck Loading Time Loader Cycle Time x Number of Passes to Fill Truck Loaded Travel Time from curves uphill or grade retarder speed tables downhill Empty Travel Time from curves uphill or grade retarder speed tables downhill Total Truck Travel Time Loaded Travel Time Empty Travel Tim
68. ity and seeds use of data averaged over a period of time such as a yeat or two may provide a more defensible rate For costs with demonstrated trends the addition of an inflation deflation factor may be appropriate if the term of the cost estimate is long enough to be affected by those trends e Mine Data For cost estimates intended for planning and budgeting purposes the best source of data is generally the mine for which the cost estimate is being calculated or a similar mine in the general region Where these data are available care must be taken to ensure that the reported data includes all indirect costs applicable to the intended purpose of the cost estimate O Important Note The data loaded into the Model must not include fuel cost This is calculated in the Model from published fuel consumption data and the fuel cost in the Cost Data File imported into the Model Project Data The Model was designed to allow a broad range of methods for gathering the project data required to estimate a reclamation and closute cost However the accuracy of the maps and project data available will have a direct impact on the accuracy of any cost estimate prepared using the Model At a minimum accurate topographic maps 3 3 Version 1 12 GATHERING YOUR DATA showing all project facilities at the time of closure and after reclamation is complete are critical to provide user input data required by Model e Maps At the most basic level m
69. ity such as a tailings embankment the same geometric dimensions needed to calculate a regrade volume will still be needed as user input The surface of a tailings impoundment may also require regrading as part of closure However because the final configuration of the tailings will vary greatly depending on the deposition of tailings in the final years of production there is no simple method for calculating the volume of material that will require regrading at closure Therefore the user must calculate this volume separately and input it directly into the Model Roads The Roads module uses nearly identical calculations to those used by the Exploration Roads and Pads module to calculate the cost of regrading of other roads The only significant difference between these two modules is the types of equipment used and the addition of safety berms to the regrade volume calculation in the Roads module The Haul Road Safety Berms table allows the user to account for the volume of safety berms constructed along the side s of a road The Model will use the berm dimensions input by the user to calculate the berm volumes for each road entered Because the berm length is separate from the road length the user can enter the same length as the entire road or a shorter length if the berm only extends along a portion of the road Depending on the situation and regulatory requirements berms may be required on one or both sides of the road and the Model allow
70. ize the adverse visual effects Quality assurance all those planned or systematic actions necessary to provide adequate confidence that a product process or service will conform to established requirements Quality control inspection test evaluation or other necessary action to verify that a product process or service conforms to established requirements and specifications Quality management concerns the optimization of the quality activities involved in producing a quality product process or service s such it includes appraisal training and prevention activities Regrade regrading reshaping of a surface to create a different surface profile reprofile reshape Resale value the monetary sum expected from the disposal of an asset at the end of its economic life its useful life or at the end of the study period Revegetation the actions taken to establish vegetation at a mine site or portion thereof that will be consistent with the post mining land use and self sustaining Salvage value 1 the cost recovered or which could be recovered from a used property when removed sold or scrapped 2 the market value of a machine or facility at any point in time normally an estimate of an asset s net market value at the end of its estimated life 3 the value of an asset assigned for tax computation purposes that is expected to remain at the end of the depreciation period Schedule the plan fo
71. justed by the user in the International version at the top of the Productivity sheet in the Model The Model combines the information input by the user for each facility with the productivity formulae tables and correction factors created from published data and industry data to calculate the individual productivity As an example if a user adds a 30 meter high dump facility that will require grading from angle of repose to a 3H 1V slope the Model will follow the following steps to estimate the cost to regrade the slope 1 Calculate volume of cut material to push 2 Calculate the push distance 3 Apply the Dozing Distance vs Productivity Curve Formulae to estimate uncorrected productivity 4 Apply correction factors based on user input and standard values to calculation cotrected dozer productivity 5 Divide dozing volume by corrected productivity to calculate work hours 6 Multiply equipment and labor rates to work hours to calculate cost Miscellaneous Productivity Calculations Where published equipment data is not available to calculate productivities other sources including published cost databases contractor data and field data were used to determine productivity information for other types of equipments and crews Bore plugging and well abandonment productivities are based on data from approximately 65 exploration drillholes and 30 monitor and production wells These data taken from daily drillers logs were compiled to det
72. ksheet including Revegetation Materials Well Abandonment Materials Monitoring Costs and Fuel Etc The units for each depend on the specific material and the Units of Measure selected on the Source Data worksheet There are fifteen columns included for each type of data required corresponding to the different cost bases or regions NOTE the user defined in the Source Data worksheet Each section ee contains rows to document the source of the data and or directly into some user additional user comments input cells in the Materials worksheet in the Model This worksheet contains some standard material types as well as providing additional rows in most of the sections for the user to add additional material types The units are generally automatic fields because the Model requires these data to be input in specific units although some rows allow the user to input units for these materials Generally data with user defined units would only be used for calculations done in the User Sheets in the Model There are rows for notes and data soutces in each section of this worksheet Miscellaneous Unit Costs This worksheet contains a number of miscellaneous unit costs that ate used in the Model It also contains some unit costs that are not used by the Model but could be useful as inputs performed by the user in the User Sheets in the Model Many of these miscellaneous unit costs are used in the Model in conjunction with crews and
73. lamation and closure activities e GIS Geographical Information Systems software combine the use of vector and image data into a geographical database GIS can combine the functionality of data collection from maps digital design drawings and survey data Two dimensional measurements such as lengths and areas can be obtained directly from the tables Three dimensional data can also be incorporated into the attribute tables using built in formula calculations Utilizing aerial photography and sutvey data travel distances and slopes can also be calculated GIS also provides the ability to document measurements made into tables as a visual auditing trail e Air Photos Current aerial photos over a site can provide the basis of the physical dimensions needed by the Model to calculate the cost estimate Aerial Photos once registered in geographical space allow you Version 1 12 34 GATHERING YOUR DATA to visually see the footprint of features and can be combined into a GIS database Vector tables can be created from visually tracing features and then geometrical information can be obtained directly from the GIS Internet Tools other tools such as Google Earth are available via the internet Google Earth provides aerial photography on a geographical platform where you can draw measure and obtain physical dimensions for the Model using the tools provided This method can be extremely helpful in areas where site data is not available an
74. lities 4 A table of surface areas and topsoil volumes is shown by facility type and total Reclamation Monitoring The Reclamation Monitoring section of the Monitoring module allows the user to specify the cost of post closure monitoring of the revegetation and geotechnical stability of the site Periodic field work and reporting options for both vegetation monitoring and monitoring by an engineer are provided The user enters the work hours days pet year and the length of the monitoring period for a field geologist or engineer and a revegetation specialist see Figure 26 5 23 Version 1 12 ENTERING DATA 40 Reclamation Monitoring gn Number of 41 Description Hrs Day Days Year Years Rate 42 ihr 43 Field Work 44 Field Geologist Engineer 5 5 18140 45 Range Scientist 2 5 5140 46 Reporting 47 Field Geologist Engineer 1 5 140 48 Range Scientist 2 5 140 49 Subtotal 50 Travel E54 Trips Year Years Truck Cost 52 hr ihr 3 Travel 2 5 i 2 08 54 Subtotal E3 Figure 26 Reclamation Monitoring Note Users of the SRK Batrick Model may wish to use the Closure Planning module to track annual monitoring costs because that module allows the user to include and document a number of different types of reports and studies Geochemical Monitoring The Monitoring module also includes options for collecting and analyzing rock and water samples Sampling labor travel analytical and
75. lude placeholders for some typical activities associated with closure solution and water management These include e Pumping e Forced Evaporation e Water Treatment and e Decontamination The Pumping Forced Evaporation and Decontamination tables include calculations to estimate the cost to pump water from one location to another using Manning s Equation and standard hydraulic formulae These formulae require user input for the diameter and material type of the pipe the static head the required flow and other parameters needed to estimate the energy required Combining this information with the unit cost of energy either entered in the Reclamation Materials module or overridden by the user at the top of the module labor rates and pumping schedule and user entered capital costs the Solution Management module can estimate the total capital and operating pumping cost for these activities The Forced Evaporation option also allows the user to define the pressure required at the end of the pipe This information is usually available from the manufacturer of the evaporation system or can be obtained from operation data The Water Treatment option requires the user to estimate the treatment costs externally By applying the user supplied capital and operating costs to the treatment quantity and duration the Model calculates a total water treatment costs not including pumping Because the labor required for different treatment methodologies
76. lude rock backfill or expanding foam The volume of a barricade or backfill is computed from the user input parameters If a combination of a cement barricade and tock backfill is selected the Model assumes that the adit opening will be filled with backfill from the opening to the cement wall Similarly if expanding foam is used the Model assumes that a minimum of 5m 15ft of backfill is required to protect the foam plug Shafts The two basic options for closing shafts are the construction of a concrete reinforced cap If a cap is selected it is assumed to be an elevated 1 way beam and reinforced concrete slab 45cm 18in thick A minimum of 3m 10ft of backfill is assumed as cover on top of the cap Backfill is assumed to be performed by trucks and loaders with a small dozer to push the material into the shaft Haul Material The Haul Material worksheet is a module that calculates the cost of hauling gt any type of material from one location to another using trucks or scrapers The fleets used for these calculations include loading equipment and a small dozer to spread the material moved This module uses the same basic formulae as the routines used to calculate the cost for hauling cover and growth material materials in many of the other modules However it also includes options for crushing and screening the material prior to placement and compaction of the placed material 5 15 Version 1 12 ENTERING DATA If screening or crushing
77. mp height 20 m Mid bench length ______m Underlying toe slope y o grade Current dump slope H 1V Final dump slope 2 7H 1V Final footprint area ha Final slope on top of dump 1 grade Other things that need to be considered Cover borrow sources Topsoil borrow sources Revegetation types B 1 TUTORIAL EXCERCISES B 2 TUTORIAL EXCERCISES Exercise 1 Answers Here s how our measurements came out e Dump height 20m e Mid bench length 1147 m e Underlying toe slope 1 grade e Current dump slope 2 H 1V e Final dump slope 2 7H 1V e Final footprint area 11 ha e Final slope on top of dump 1 grade TUTORIAL EXCERCISES Exercise 2 Complex Waste Rock Dump This exercise uses an example of a multiple lift waste rock dump with varying heights and current slopes The first step is to determine what the closure plan for the dump is What does it say about the following e Regrading e Cover e Topsoil e Ripping e Seeding The next step is to determine the key geometric parameters that the Model needs to perform the volumetric and area calculations Use the map for Exercise 2 to fill in the blanks below e Dump heights i 5 m e Mid bench length gt gt m e Underlying toe slope 1 e Current dump slope A 3 H 1V e Final dump slope 2 7H 1V minimum e Final footprint area ha e Final slope on top of dump 1 grade Hint there a
78. ncluding bug fixes Testing for any model only includes scenarios contemplated by the testing team because the Model was developed to be as flexible as possible there are undoubtedly many possible scenarios that have yet to be tested As users attempt to use the Model in ways unforeseen by the testing team new issues are likely to arise On the other hand as the Model continues to be used by different people on different mine sites it will improve provided the users continue to provide feed back The best way to do that is to submit suggestions and bug reports through the www nvbond otg web site Conventions Used In This Manual In order to make this manual readable and useful as a TEXT CONVENTIONS functional user guide A 2 Formul algoritt standardized text formatting Ape PT conventions have been used Property Information Module or Table Name These formats are intended to highlight different components of Regrade Volume Cell Name the Model and model input Delete Button Name requirements Icons have also been used to highlight important information included in the manual Notes and tips are shown in grey boxes with the icons along the other edge of the page Special icons are also used to denote capabilities only ICON KEY Model Generally these available in certain versions of the y Important Note differences are cumulative Le Ne Tip what is available in the Nevada version is
79. nd consistency in the calculation of costs for mine sites reclamation Purpose The purpose of the Model is to provide a tool to assist mining professionals improve the consistency and accuracy of reclamation and closure cost estimates Although the Model was developed to provide standardized approaches to reclamation and closure cost calculations the need to account for diverse approaches to mine closure and differences between mining operations and regulatory requirements required that the Model also provide a reasonable amount of flexibility To that end the Model requires fairly limited user input to perform the cost calculations yet allows the user to combine or subdivide the input data in a number of different ways to account for site specific conditions and reclamation methods 1 1 Version 1 12 INTRODUCTION Background In late 2002 a group of mining professionals representing the mining industry and state and federal regulatory agencies in the State of Nevada USA met to discuss the concept of developing a standardized cost estimating approach to improve the purposes This initial meeting led to the formation of the NSUCP which ultimately provided guidance used in developing the Model The Model was originally developed primarily for use in the State of Nevada and as such the original version tended to focus on the types of facilities and approaches commonly used for mine reclamation and closure in Nevada The format of
80. nes For example if there is an additional premium added to labor rates scaled by distance from a particular location e g a major city up to seven different hourly zone adjustments can be added The zone and area adjustments can also be used to account for lodging and meals on projects where laborers will be housed in a camp Additional adjustments to labor rates can be entered as a cost per hour or a percent of the hourly base rate in the Labor Rates worksheet in the Model Version 1 12 4 4 GATHERING YOUR DATA Each section also includes some rows where notes on data sources zone adjustments or other notes can be entered In order to ensure the Model results can be audited the user should take the time to input the source of their labor cost data and any adjustments made thereto Indirect Costs such as Social Security Workman s Compensation Unemployment Costs or other costs added to the hourly rates in the form of a percentage can be added at the bottom of this worksheet In the U S and other jurisdictions some or all of these indirect costs are mandated by law or regulation In other jurisdictions these costs may be defined by corporate policy or labor contracts Three additional rows are available for other labor rate specific indirect costs Reclamation Material Costs The Reclamation Material Costs worksheet contains unit costs for various materials required for reclamation and closure There are four major categories in this wor
81. nnnnnnnnnnnnnnnenr 5 4 Figure 11 Property Information Worksheet non Nevada version shown 5 5 Figure 12 Road Recontouring Calculation eene 5 7 Figure 13 Exploration Road Inputs eren 5 7 Figure 14 Exploration Road Zones eee 5 8 Figure 15 Waste Rock Dump or Heap Slope Inputs 5 9 Figure 16 Regrading Volume Inputs eere 5 9 Figure 17 Example Waste Rock Dump eese nennen 5 11 Figure 18 User Input for Example Waste Rock Dump 5 11 Figure 19 Tailings Impoundments eren 5 12 Figure 20 Tailings Embankment Parameters eene 5 13 Figure 21 Buildings and Foundations eese 5 17 Figure 22 Diversion Ditches 8 Sediment Ponds 5 19 Figure 23 Process Pond User Input eese 5 20 Figure 24 Well Seal Thicknesses m mrrnsvrnnnsvnnnnvnnnvvnnnnnvnnnnnnennvvnnnnvnnnnnnnnnnnnnnnennnn 5 22 Figure 25 Reclamation Maintenance eese 5 23 Figure 26 Reclamation Monitoring rrnavnnnnnvnnnnvnnnnvnnnnvnnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnennn 5 24 Figure 27 Rock amp Water Monitoring
82. nown Issues Page rnssnnnnvnnnnnvnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnnennnnnnnnnnnnnnneenr 6 11 Figure 47 NVBond org Bug Report mms rnnsvnnnnvnnnnvvnnnvnnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnnnnner 6 11 Figure 48 NVBond org Suggestion Page esee 6 12 Appendices Appendix A Technical Reference Appendix B Tutorial Exercises Version 1 12 iv Chapter Introduction The Model was developed to provide a useful reclamation and closure cost estimating tool that standardizes user input requirements productivity calculations volume and area calculations in a consistent format while allowing enough flexibility to incorporate site specific conditions question is fairly simple we did it to provide a tool to facilitate accuracy completeness and consistency in the calculation of costs for mine site reclamation The process to achieve that goal wasn t so simple T his chapter could be subtitled Why did we do it The answer to that The Standardized Reclamation Cost Estimator SRCE model the Model was originally developed with guidance developed during the implementation of the Nevada Standardized Unit Cost NSUC Project a cooperative effort between the Nevada Division of Environmental Protection Bureau of Mining Regulation and Reclamation NDEP the U S Department of Interior Bureau of Land Management BLM and the Nevada Mining Association NvMA to facilitate accuracy completeness a
83. nsed to conduct business which guarantees the owner that the contract will be completed Performance Bond and that subcontractors and suppliers will be paid Payment Bond Surface area the area of the non planar surface of a facility to accurately estimate cover and revegetation areas Surface water all water open to the atmosphere and subject to surface runoff System a collection of hardware equipment and facilities and related software procedures etc designated to perform a unique and useful function A system contains everything necessary except personnel and materials or supplies to perform its defined function Tailings impoundment a process component which is the final depository for processed ore discharged from a mill G 7 Version 1 12 GLOSSARY Task Smallest unit of work planned It must have an identifiable start and finish and usually produces some recognizable results Temporary closure the cessation of the operation of a process component for more than 30 days as a result of a planned or unplanned activity Topsoil the material at or near the surface of the earth which has been modified and acted upon by natural physical chemical or biological agents in a manner which will allow it to support revegetation Uncertainty unknown future events which cannot be predicted quantitatively within useful limits eg accidents which destroy invested facilities a major strike a competitor s inn
84. ntered into the facility worksheet with any additional covet layers being entered into the Haul Material worksheet If only three layers are required the user can enter all of these in the Haul Material worksheet Each line in the Haul Material worksheet will allow you to add another three cover layers the first being the material you haul and then a cover and growth media over the hauled material The worksheet can now be filled out as any other worksheet with surface area as calculated above average ripping distance of surface area volume of material to haul as calculated above distances to the source material and slope to source matetial Cover and growth material can also be entered This module has options to include costs for crushing screening and or compacting the primary material hauled If crushing or screening options are selected the user must also input the additional distance that the material will be hauled from the crushing screening plant If compaction is selected the Model assumes that a vibratory roller will be used for compaction Costs for crushing screening and compaction are based on per volume costs included in the Misc Unit Cost worksheet Up to two Version 1 12 HOW DO I 4 additional layers can be added by using the cover and growth material options in the same manner included in many of the other modules When working with more than two cover layets you will need to be aware of what you have enter
85. o simulate The best results will be obtained from the Model when used by a qualified mine closure professional with an understanding of closure planning construction techniques used for mine reclamation and closure and standard cost estimating practices Howevet by creating a tool that can be used by less experienced people we recognize that it will be used by people with a broad range of skills and experience With that in 1 3 Version 1 12 INTRODUCTION mind we offer the following cautions and caveats that one should consider before embarking on the process e The Model results are only an estimate It is always tempting to believe the numbers that come out of a computer model without question Howevet for a number of reasons it is important to remember that the Model results are only an estimate A number of factots that will affect the accuracy of the estimate but it is nonetheless only an estimate Issues such as numerical rounding the reliance of the calculations on other estimates for components such as productivities and volume calculations and the accuracy of the input data will all affect the level of accuracy It is important to understand both the limitations of the estimate and the areas of uncertainty in the data used and the calculation methods e Know the intended use of the estimate What you plan to do with the estimate will dictate the amount of effort required to gather the information needed to provide the accuracy
86. of Mining Regulation and Reclamation NDEP the US Deparment of hterior Bureau of Land Management BLM and the Nevada Mining Associaton NVMA to fac ltate accuracy completeness and consistency in the calculation cf costs far mine sites reclamation Technical Support Information This model was developed and is supported on a volunteer basis f you have questions on howto use the model please ses the EAQ page you have a bug to report please submit a bug report Korm You may also wart to check out the known issa The project was implemented largely on a voluntary basis with inital funding provided the N A The SRCE software cortinues to be developed and supported on a voluntary basis and Me key avaiable reo of charge For more information on me proc pease see the ICE page To help you make better use of tho model and help us continue to Improve it weve provided a number of resources here to help you report and resolve problems suggestimprovemerts and men leam about the model and me Nevada Standardized Unt Cost project Version 1 1 1 Update to Version 1 1 Now Available Seo the FAQ page to gat the latast information about tho bug es in Version 1 1 1 This release updates Version 1 1 which was found to have two poterbaly significant bugs for smal progcis Note you wif need fo download one of the new cost dala fles or this version Io work property Version 1 1 Now Available See the What s New page to get the latest information
87. olution channels Version 1 12 5 8 ENTERING DATA surrounding the heap before regrading Heap and dumps are typically constructed as side hill valley fill or valley floor configurations With limited input data from the user the Model can estimate reclamation and closure costs for all of these configurations First the Model calculates the volume of material requiring regrading and the final surface area of the facility by using the basic geometry of the facility and the methods desctibed in Chapter 2 The input required to perform these calculations are shown on Figure 15 and Figure 16 and includes the height underlying otiginal ground slope ungraded slope the mid bench length and the final facility footprint The Model also allows the user to input a final grade for the top of the facility but typically this will only slightly affect the regrading volume calculations Regraded final dump slope Total Dump Height Ungraded original dump slope Underlying original ground slope Figure 15 Waste Rock Dump or Heap Slope Inputs Final regraded Dump Footprint Dump Footprint Mid Bench Length Figure 16 Regrading Volume Inputs 5 9 Version 1 12 ENTERING DATA In the simplest configuration the data required to calculate waste rock dump and heap leach closure costs is fairly straightforward However the configuration of a waste rock dump or heap leach facility can a
88. om a Worksheet By selecting the Clear Sheet button from the top or side of a worksheet all user input information will be deleted from a worksheet but all of the rows will remain in the tables Use this option to empty the data from a worksheet without removing the lines for the facilities This action cannot be undone Version 1 12 ENTERING DATA Deleting Facilities Selecting the Delete button at the top or side of a worksheet will delete facilities rows from a model In the current Model versions v 1 0 to 1 2 the user can only delete one facility at a time dialogue box will prompt the user to select the facility to be deleted and after the user confirms the deletion the corresponding rows will be deleted from each of the tables on the worksheet Add Dump Clear Sheet Delete Dump Do you really want to delete this facility Once you delete a row you cannot undelete it or Undo this action fill in ALL green cells and relevan Physical Select facility row you want to delete Select facility row to delete G Distance Sic 1 North Waste Rock Dump from fre Final Top Lift dump South Waste Rock Dump i Cover Dun Slope Height Borrow Grade area are used Figure 10 Deleting Facilities Entering Data into Worksheets The procedure for entering data into each of the worksheets has been standardized in the Model to the highest degree possible Howev
89. on the reclamation of exploration roads and drill pads Exploration Drillholes The exploration drillhole abandonment module on the Exploration worksheet allows users to estimate the cost of plug exploration drillholes using a number of methods including top plugs grouting grout backfilling and cementing If no method is selected then no cost is calculated If the water depth is above the bottom of the hole and grout backfilling is selected as the Hole Plug Method then the Model calculates the amount of grout required to fill the hole from the bottom to the distance above the water table defined in the Minimum Seal Above Groundwater Table distance entered in at the top of the worksheet An option is included to allow for removal of casing for situations where casing is set in pre drilled holes or for navigational drilling Multiple holes can be added on a single line using an average depth and limiting the number of lines required to estimate all drillhole abandonment costs Exploration Trenches Backfilling and seeding of exploration trenches assumes that the trenches were created using a bulldozer to push material to the ends of the trench and then backfilled using a bulldozer to push the material back into the trench The volume of the trench is calculated based on the information provided by the user according to the diagrams and information shown on the worksheet Although the trench may be on a slope the Model assumes that the do
90. or earthwork volumes or areas i e regrade volumes or areas for revegetation These override cells allow the user to input volumes or areas dd Bien manually within the various modules allowing control print Slope over a few limitations of some of the volume wres in calculations see Waste Rock Dumps and Heap Leach Pads Where approptiate data entry tips are provided when a cell is selected When the user selects a cell containing a data entry tip with the mouse or by pressing the Tab key a small text box will appear with useful information regatding what is expected or providing additional information on the form of the data expected As shown here the data entry tip indicates postive walue regrading ende T that by entering a positive value in this cell the Model erede will assume that the slope will be graded down the Will be rto underlying slope The Model will assume that the slope will be regraded into an opposing slope if a negative value is entered in this cell Basic Model Commands The Model has been designed to use a consistent set of commands for similar actions regardless of the type of facility being modeled Where applicable buttons to add facilities clear the user data and delete a facility are included at the top or along the Version 1 12 5 2 ENTERING DATA right side of a spreadsheet Each of these buttons performs the same function on each worksheet where it is found Adding Faciliti
91. or entry into the Model TUTORIAL EXCERCISES TUTORIAL EXCERCISES Exercise 3 Answers Here are out measurements for the two cells e Embankment height 20 8 m e Mid embankment length 2306 867 m e Underlying toe slope 1 1 e Current embankment slope 2 7 27 H 1V e Final embankment slope 27 27 H 1V e Tailings surface area 40 4 9 6 ha e Tailings regrade volume _ m3 for the regrade volume you will need a regrading plan to determine how much material must be moved to create the final top surface TUTORIAL EXCERCISES Exercise 4 Open Pits This exercise uses an example of a single pit with a partial safety berm bund in place The first step is to determine what the closure plan indicates how far from the final pit highwall to construct the berm bund In the example shown in this figure the pit buffer line represents the maximum possible area that could collapse into the pit The pit safety berm bund should be placed outside this area Use the figure for Exercise 2 to fill in the blanks e How much of the existing safety berm bund needs to be replaced because it is inside the pit buffer m e How much new safety berm bund need to be constructed m Hint You shouldn t need a safety berm bund if there is a facility adjacent to the pit that would keep people from the pit e g a waste rock dump B 10 TUTORIAL EXCERCISES Exercise 4 Answers Here are our answers for
92. or varying the amount of management and maintenance based on the phase of the closure work ie active closure and monitoring and maintenance The Construction Management table includes options for the number of project supervisors temporary office space and toilets see Figure 28 Generator power for the office is automatically added based on the number of office trailers selected 5 25 Version 1 12 ENTERING DATA Construction Management Construction Management Staff Hours Number of Supervisor Equipment 19 Description Duration Month Supervisors Rate Totals 20 mo hr ihr x D x n i Active Reclamation ___ 1 900 800 22 Monitoring 144 000 Number of Rental Generator Equipment E Duration Units Rate Cost Cost Totals mo mo imo RE SAR amp Maintenance Total Staff 26 Description Temporary Office Rental Temporary Toilets 30 Total Support 73 494 31 32 Notes Office rental assulnes only 1 generdor required for every trailers 33 d 2 146 649 Total Construction Management Figure 28 Construction Management In the Road Maintenance table the user can select the size and number of pieces of equipment used for road maintenance see Figure 29 In addition the time required for the fleet can be entered by the phase of closure If water for dust control must be purchased this can also be entered in
93. ork time However overall it is likely to provide a reasonable approximation of the time required Comparisons with field data may result in future modifications to this approach Top Slope 2 Dozing distance za Co Dozing a distance 7 Gutto Fillpivot point optimized Original slope a Ungraded slope nume RET gt Fill Figure 7 Dozing Distance Calculation Version 1 12 2 8 HOW IT WORKS Cycle Times for Material Hauling Fleets Cycle times for material hauling fleets are estimated by combining the uphill travel time curves and the downhill travel speed tables with the project data provided by the user Loaded vehicle weights for use with the travel speed tables are based on standard materials included in the CAT Handbook The Rolling Resistance factor used assumes a regularly maintained dirt road will be used The equipment cycle time is then calculated as follows Cycle Time Maneuver to Load Time Loading time Loaded Haul Dumping Time Empty Haul Time The loading time is based on the cycle time for the loading equipment e g front end loader The loaded and empty haul times ate based on either the travel time cutves or travel speed tables depending on whether the equipment is performing an uphill or downhill loaded haul Fleet Productivities Fleet productivities are the compilation of the individual equipment productivity of all of the equipment in the fleet The fle
94. ost of the required project data can be gathered using a topographic map and an engineer s scale Facility heights can be obtained from the contour elevations Most distances and areas can be measured approximately with an engineer s scale and slopes can be calculated from scale measurements and contour elevations printed on the map A planimeter can be use to improve the accuracy of the distance and area measurements e Electronic CAD Drawings Obtaining measurements from drawings created in a CAD package such as AutoCAD is a very effective method of collecting project data required for the different modules of the Model Two dimensional measurements such as lengths and ateas of project facilities can be obtained directly from CAD drawings Three dimensional parameters such as heights slopes and volumes can often be directly obtained from CAD drawings or if necessary calculated from two dimensional measurements e Mine Planning Software Like CAD mine planning software can provide all of the physical dimensions needed by the Model to calculate the cost estimate These software packages can also estimate volumes and often can calculate cycle times volumes and reshaped slope dimensions which can be used to check the Model calculations When using the Model to schedule costs a mine planning package can also provide useful information on how it will take a given fleet to perform an activity and also assist in the sequencing of the rec
95. osure monitoring petiod The Total Revegetation Surface Area is 4 19 Reclamation Maintenance calculated as the sum of the surface areas included in all of the other u modules Because the calculation of alm iia total surface area does not 2RevegetstionMeintenanee differentiate areas to be seeded and 2 Equipment areas that may not be seeded the user may need to reduce the 5 percentage requiring reseeding fa significant amount of the total Total Area Revegetation Requiring Surface Area Reseeding Seed Mix select Ri Re None Mix 1 Mix 3 Mix 4 User Mix 1 User Mix 2 Average Total Volume Topsoil sutface area included in the Model Volume Requiring Placement d P h 32 Topsoil Maintenance Cost oes not require seeding or Nas 33 m3 im3 been successfully seeded and will 3 Erosion Maintenance not require reseeding Figure 25 Reclamation Maintenance The Model also estimates the average topsoil placement cost based on the average of the average costs by facility weighted by the volume of topsoil required by each facility The average topsoil placement cost for all facilities is used in the Monitoring module to estimate the cost of replacement of topsoil respectively see Figure 25 for all facilities in the Reclamation Quantities module This module also calculates the average costs for topsoil placement by facility type and for all faci
96. ound Openings eese nennen 5 15 Faut Material OE EN 5 15 Foundations and Buildings eiie hannen eek 5 16 Other Demolition and Equipment Removal 5 18 Diversion Ditches and Sediment Ponds ssss 5 18 Process POMO un Arne 5 19 IB iere gd 5 20 YAras Ete s et idea 5 20 Waste Disposal aot nmel 5 20 Well ADA On MENE ido serer dd 5 21 MiC COSI enaa EEr RE 5 22 MONO od 5 22 Construction Management sess seen 5 25 Solution Water Management sse 5 27 Closure Planning u s o etae een 5 28 Other PI RM e 5 28 General and Administration essere 5 28 Human esos amc ter oe karmin Ebo bin 5 28 User SHOES a ete eee T ae 5 29 How doll 2 necssssesausuxk ozunuu uva iui i rus buau p r uo auus OL Import Cost Data in to the Model 6 1 Import Data from a Previous Model File 6 2 Calculate Closure of Multi Lift DUMPS 6 3 Multi lift additive aee ri E dota rer oe metr Exe Pike qe x eoe esr 6 3 Multi lift Separate RR nia ida 6 4 Version 1 12 ii TABLE OF CONTENTS Create a Cover with More than Two Layers 6 4 Incorporate Cyanide Code Compliance 6 6 Calculate Pit Backfilling ess
97. ovation which makes the new product obsolete Unit cost cost per unit of production It is usually total cost divided by units of production but a major cost divided by units of production is frequently referred to as a unit cost for example the total unit cost is frequently subdivided into the unit costs for labor chemicals etc Updating the regular review analysis evaluation and reporting of progress of the project including recomputation of an estimate or schedule Useful life the period of time over which an investment is considered to meet its original objective Wastewater a combination of the liquid and water carried wastes from a residence commetcial building industrial plant or institution and any groundwater surface water or storm water that is present Water well an encased excavation made by any drilling method for the development of groundwater from its source Zero discharge the standard of performance for the protection of surface watets which requires the containment of all process solutions Definition sources Nevada Administrative Code NAC NAC445A or NAC519A Dictionary of Geological Terms 3rd Edition American Geological Institute Version 1 12 G 8 GLOSSARY IAACH International Recommended Practice No 108 90 Cost Engineering Terminology Copyright 2004 Association for the Advancement of Cost Estimation SS G 9 Version 1 12 Index Version 1 12 IN
98. productivities defined in Means Heavy Construction Cost Estimating Guide to estimate costs for non earthwork activities Version 1 12 GATHERING YOUR DATA There are columns in the Miscellaneous Unit Cost worksheet for each unit cost corresponding to the different cost bases or regions the user defined in the Source Data worksheet Each basis contains two columns The contents of the two different columns for each basis vary by the type of unit cost being entered In other cases only one of the cells may be a user input cell For some rows the columns may be user input cells for labor equipment or material rates In other sections the columns may be user input cells for premiums expressed as a percent daily productivity in number of units completed during an 8 hour shift or a total cost per unit Indirect Costs This worksheet contains a table to allow the user to input various indirect costs used in the Cost Summary table in the Model to apply indirect costs either as a percentage of direct costs or as a variable rate based on the magnitude of the direct costs The format for this table corresponds directly to the U S Department of Interior Bureau of Land Management BLM requirements for direct costs However the table could be edited to some degree for other uses Indirect Costs Include Engineering Design and Construction ED amp C Plan 7 Contingency 8 Insurance 9 Bond 10 Contractor Profit 11 Contract
99. r completion of a project based on a logical arrangement of activities resources available imposed dates or funding budgets Version 1 12 GLOSSARY Specification design prescriptive a design specification providing a detailed written and or graphic presentation of the required properties of a product material or piece of equipment and prescribing the procedure for its fabrication erection and installation Specification performance a statement of required results verifiable as meeting stipulated criteria and generaly free of instruction as to the method of accomplishment Specifications written directions regarding the quality of materials and the nature of the workmanship for a job Specifications may be written directly on the drawings or presented in a separate document Spring a naturally occurring point of discharge where groundwater becomes surface watet regardless of whether the water is developed for use Stochastic cost estimating method a cost estimating method in which the independent vatiable s used in the cost estimating algorithms are generally something other than a direct measure of the units o fem being estimated The cost often are somewhat subject to SU standard pH units Supplier a manufactui agency that the approved redla and closure activities for a project can be performed by a third party sh uld the operator default on their obligation 2 a bonding company lice
100. r different equipment an erent cost currently used in the bases or regions These costs could be rental rates mine Model ownership costs or any other basis but typically exclude the equipment costs documented in the other tables in this worksheet Preventative Maintenance Cost This table contains hourly costs for mechanic labor and consumables excluding fuel G E T and Tires used in preventative maintenance of the equipment O Important Note The data loaded into the Model must not include fuel cost This is calculated in the Model from published fuel consumption data and the fuel cost in the Cost Data File imported into the Model 4 3 Version 1 12 GATHERING YOUR DATA G E T Consumption This table contains the hourly cost for wear of Ground Engaging Tools for applicable equipment G E T costs might include the wear costs associated with bulldozer blades ripper shanks and hydraulic hammers Tire Cost Table This table contains the total cost per tire for equipment with tires For backhoes or other equipment that use different size tires on the front and back axles calculate the average cost per tire i e cost of front tire cost of back tire 2 Labor Rates The Labor Rates worksheet contains hourly rates for the different types of labor used in the Model These labor costs are categorized by job task such as Equipment Operators Truck Drivers Laborers and Project Management and Technical Labor There are
101. r of changes and enhancements based on input from the trial period including new productivity formulae for exploration drill road reclamation During the period July 2006 through August 2009 a number of enhancements and additions were made to the international metric version of the model These changes were based on feedback provided by a number of users on six continents Although not every change or new feature requested by the users was incorporated into the current version of the model many enhancements were made The author of the Model and many of the active supporters of the NSUC Project always envisioned that it would evolve through use change improvement and expansion Several revisions of the Model have already been released since the original trial period ended including a version that is capable of using either imperial or metric units Other improvements and additions have already been added to the original version some of which have been incorporated into the Nevada version of the Model Others have yet to undergo the testing and approval process required for inclusion in the Nevada version Many additional capabilities have already been added to the international version of the model some of which may be added to the Nevada vetsion at some time in the future Things to Remember In order for any model to provide useful results the user must understand not only the Model but also the system that the Model is intended t
102. reporting costs are calculated based on the time required for each event the number of events per year and the length of the monitoring period see Figure 27 Version 1 12 5 24 ENTERING DATA 62 Ground amp Surface Water Monitoring 63 Field work No of units Hrs Day 2 10 64 Description Events Year No Years B Field Tech Sampler Pickup Truck Pump purchased 71 Water and Rock Sample Analysis 72 Description Samples Events Year No Years Analysis Cost Supplies 73 Sisample sample 75 Water Analysis WAD CN 10 4 5 375 00 40 00 20 1 1 4 M RJ gt 78 Water Analysis Complete 1 79 Cyanide WAD 80 Cyanide Free 81 Cyanide Total soils Cyanide Total water 82 TPH in soils v Man hours Events Year year No Years TIP To enter one time sampling event in the Water and Rock Sample Analysis section enter the number of samples and then enter a 1 in both the Events Year and No Years cells Construction Management The Construction Management and Road Maintenance module allows the user to add general management construction support and maintenance costs necessary to complete the closure project Costs included in this module include the cost of project supervision temporary power and office space and road maintenance crews Each section of the module provides options f
103. riably depending on the particular version being loaded Some modules will require editing and a few will only partially load due to some differences in some of the version build being loaded Therefore it is critical that the user carefully check each worksheet after importing the data Version 1 12 HOW DO I 4 Calculate Closure of Multi Lift Dumps Multi lift dumps can be estimates in a number of ways depending on how you need to treat the reclamation of the dump Because the Model does not limit the user to using a single line item for each waste rock dump and heap leach a complex dump can be subdivided into sections to increase the overall accuracy of the Model calculations for the facility Fist determine what the lift heights are if the current slopes both underlying ground and lifts are the same for each lift if any or all lifts need to be regraded seeded ripped fertilized or any other specific reclamation activities If all the heights slopes and reclamation activities are likely to be the same you can enter as a Multi lift additive If any of these are different the lift will need to be treated as a Multi lift separate Multi ift additive A multi lift additive dump can be input into the Model as a single line You will need to determine the mid bench length of each lift and then you can add them together to get the total mid bench length see Figure 36 All of the lifts on the dump can then be entered as a s
104. s the user to indicate if there are berms on one or both sides of the road 5 13 Version 1 12 ENTERING DATA Where roads cross drainages requiring significant regrading the user should calculate the volume of regrade separately This volume can then be entered directly in to the Regrade Volume override column In situations where only ripping is the only required reclamation treatment the user should enter 0 into the Regrade Volume overtide column and then enter the ripping parameters as needed TIP Where roads are located on flat or nearly flat ground either enter the regrade volume directly or use a very low underlying original slope angle to estimate a minimal regrade Pits The Pits module contains options for placing and revegetating a pit perimeter berm or pit ramp berms to preclude access into a pit If pit backfilling is required use the Haul Material module see Chapter 6 How Do I Calculate Pit Backfilling Three options exist for the berm construction method Haul amp Place Excavate and Dozer Option Description Assumes a truck and loader operation to haul material to the Haul amp Place berm location The material is end dumped and shaped with a small dozer Assumes that an excavator will excavate a trench and place the Excavate excavated material along the edge of the trench closest to the pit to create a berm Assumes a dozer will push material along a berm in a direction perpend
105. stance feet Source Caterpillar Performance Handbook Edition 34 Figure 5 Dozer Productivity vs Distance Other examples of equipment with productivity curves include the uphill travel times for scrapets and trucks For equipment that utilizes grade retarding cutves to determine downhill travel speeds i e scrapers and trucks speed tables were prepared from the curves These downhill speed curves were then used in conjunction with the uphill travel time cutves to produce cycle times from the user input data Productivities for equipment such as loaders and excavators were calculated from cycle time tables and graphs in the CAT Handbook assuming average bucket capacity and bucket sizes matched to the equipment and task Average capacity was estimated by the formula Average Capacity Struck Capacity Ve Heaped Capacity Struck Capacity As appropriate correction factors for equipment are added to the productivity calculations for each facility Some of the cotrection factors included in the Model for some or all of the equipment include Job Efficiency Slope Grading Rolling Resistance Operator Efficiency Density Correction Material Type Visibility and Slot Dozing These correction factors are based on information provided in the CAT Handbook and applied based on industry standards or site specific conditions Job Efficiency and Version 1 12 2 6 HOW IT WORKS Operator Efficiency correction factors can be ad
106. t Figure 37 User Tools Version 1 2 or later If you are using an earlier version go to the Macros option on the Tools menu see Figure 42 Version 1 12 6 8 HOW DO I SRCE Version 1_0 xls Insert Format Tools Data FlashPaper Window Help Adobe PDF FEP re 44 Protection Security Y Visual Basic Editor Alt F11 Microsoft Script Editor Alt Shift F11 Figure 38 Macro Menu This will open another dialog box that will contain at least two macro names see Figure 43 Select MakeBondMenuBar from the macro list and the StdRecCost menu option should reappear on the Excel menu Macro name In MakeBondMenuBar DeleteBondMenuBar IMakeBondMer S ar L Macros in All Open Workbooks Description Figure 39 Macro Dialog Box 6 9 Version 1 12 HOW DO I Get Additional Help Additional help can be found on the NV Bond org web site www nvbond org Ea ime O awws Wind dre Gad E K eden g Cro Men EJ Eden gsx ees d Usm me mm E Googie G UG Damos Fosas Vases oni mar EES Nevada Standardized Reclamation Cost Estimator This Web site hosts the Nevada Standardized Reclamation Cost Estimator SRCE Software that was developed in accordance with guidance developed during the implementation of ie Nevada Standardized Unit Cost Project a cooperative effort between the Nevada Division of Envronmertal Protection Bureau
107. te six sets of blanks because we divided this dump into six areas for entry into the Model B 4 TUTORIAL EXCERCISES B 5 TUTORIAL EXCERCISES Exercise 2 Answers Here s how we divided the waste rock dump into areas through F e Dump heights 14 Ms To a ls S E So e Mid bench length _691 554 1746 1176 631 230 m e Underlying toe slope 1 e Current dump slope 37 1 6 37 37 6 21 HV e Final dump slope 2 7H 1V minimum e Final footprintarea 12 5 8 14 5 1 ha e Final slope on top of dump 1 grade TUTORIAL EXCERCISES Exercise 3 Tailings Impoundment This exercise uses an example of a two cell tailings impoundment with different embankments heights The first step is to determine what the closure plan for the tailings impoundment is What does it say about the following e Regrading e Cover e Topsoil e Ripping e Seeding The next step is to determine the key geometric parameters that the Model needs to perform the volumetric and area calculations Use the map for Exercise 3 to fill in the blanks below e Embankment height 20 8 m e Mid embankment length i m e Underlying toe slope ___ ___ e Current embankment slope Hi1V e Final embankment slope H 1V e Tailings surface area ____ ha e Tailings regrade volume m3 Hint there are two sets of blanks because we handled the two impoundment cells separately f
108. the Data Files was also the result of the origins of the Model Because the initial focus of the Model was to calculate reclamation and closure bond costs the Data Files needed to be formatted to incorporate certain data and standards required by US and Nevada regulations However even during the initial development a number of the NSUC Project participants saw the potential to use the Model for other purposes Among those possible uses were mine closure cost planning due diligence feasibility studies budget tracking and financial reporting requirements As a result the initial versions and subsequent derivative versions of the Model have been and are being developed to expand the capabilities to include these other uses Nonetheless a Nevada specific version of the Model does and may always exist to meet the needs of the industry and regulators in Nevada The original version v 1 0 of the Model was released for a six month trial period in March 2006 after about three years of development and beta testing A second version v 1 1 was an update of the original based on feedback from the trial period and the first metric capable version was released in mid 2009 The NSUC Project was implemented largely on a voluntary basis with initial funding provided the NvMA for the development of the original guidelines The Model continues to be developed and supported primarily on a voluntary basis and several versions of the Model are publicly av
109. these pads in the total length of drill roads pads 5 7 Version 1 12 ENTERING DATA This can greatly reduce the total amount of lines required to estimate the total exploration road and pad reclamation cost without significantly sactificing the accuracy exploration road 9 ei drill site Slope measurement 100V 250H 40 Contour interval 50 Figure 14 Exploration Road Zones Mine Facilities In general mine facilities are larger and require larger equipment and different crews to perform reclamation and closure Therefore the Model uses different crews and methods than for exploration project to calculate the reclamation and closure of mine facilities Although there are a number of different types of facilities included in the Model the Model estimates the closure and reclamation costs of each using similar or identical calculation methods to the best degree possible For example the method for calculating the loading hauling and placing of cover on all facilities uses exactly the same formulae Waste Rock Dumps and Heap Leach Pads The Model uses neatly identical formulas and subroutines to estimate costs for waste rock dumps and heaps Therefore they are discussed together in this section modules are the additional tables in the Heap Leach module used to calculate The only difference between the Waste Rock Dump and Heap Leach 4 the cost of placing drainage pipe and drain rock in the s
110. third party costs Although contractor s estimates rarely include detailed equipment and labor rates they may be willing to provide those data upon request However when supplying rate data the contractor may intentionally provide an inflated rate to protect a competitive advantage Version 1 12 32 GATHERING YOUR DATA Equipment costs provided by contractors may be inclusive of preventative maintenance consumables and wear costs If so this should be noted and the Data File imported into the Model modified to reflect this see Chapter 4 Setting Up Cost Data Files However the hourly rate for equipment should not include the cost of fuel as this is automatically calculated by the Model based on the fuel cost and published data on fuel consumption for different types of equipment When requesting labor rate data from a contractor the basis for that data should be defined e g government vs union vs non union rates and upon receiving contractor data the user should confirm whether the labor rates provided include all indirect costs including fringe benefits tax withholding retirement funding insurance and contractor s profit If the indirect costs are not available from the contractor they may be available through government published data e Suppliers Material suppliers and vendors are generally the best source of data on reclamation and closure materials For materials with highly variable rates such as fuel electric
111. this module 36 Road Maintenance Hours Labor Equipment 37 Description Fleet Size Number Duration Month Cost Cost Totals 38 select mo hr 39 Active Reclamation 40 Water Truck Large 1 00 176 398 218 ee 41 Grader Large 2 00 36 0 176 5804 038 998 300 1 802 338 42 Monitoring amp Maintenance 43 Water Truck 44 Grader Litres Days Cost EN 45 Description Day Month Duration Litre Totals 46 select mo 47 Water Fees 48 Water Fees 2000 30 00 Total Project Maintenance 32614533 50 51 Notes 1 Supervisor equipment pickup truck El 53 54 55 Figure 29 Road Maintenance TIP To estimate the Duration for which Construction Management and Road Maintenance are required for a project review the various modules to determine the total time required to complete all activities Concurrent activities and the number and types of fleets mobilized to the site should be considered If a Reclamation and Closure Schedule is available for the project use this Version 1 12 5 26 ENTERING DATA Solution Water Management The Solution Management module provides options for calculating costs for some basic solution or water management activities This module does not provide standardized costs for water treatment estimate draindown times or include a water balance module as all of these calculation are highly site specific However this module does inc
112. tigation of sources are initiated Permit a written document issued pursuant to applicable commonwealth or provincial regulations which describes the responsibilities and obligations of the holder Version 1 12 G 4 GLOSSARY of the permit during the construction operation and temporary or permanent closure of a facility pH the negative log of the hydrogen ion concentration Plan a predetermined course of action over a specified period of time which represents a projected response to an anticipated environment in order to accomplish a specific set of adaptive objectives Planimeter A planimeter is a device which mechanically integrates an area and records that area on a drum and disk as a tracing point moves over the boundary of the figure to be measured A planimeter consists of a graduated drum and disk vernier tracing point anchor and anchor point Plugging the stoppage of the flow of water oil or gas into or from a formation through a borehole or well penetrating that formation ar otherwise significantly impedes erm does not include tailings Pond a process component which stores conf the horizontal movement of process fluide intentionally or unintentional facility to prevent the conta through naturally occurring enkiro expected at the mine site hental conditions which may be reasonably Productive postmining land use means a use which supports activities including wildlife habitat
113. tion Drill Roads and Pads FIOI e exploration road r drill site Contour interval 50 B 17 Additional Information Working versions of the Standardized Reclamation Cost Estimator the Model and additional user support information including this manual is available at www nvbond org TUTORIAL EXCERCISES Exercise 7 Answers Here are our answers for Exercise 7 e No of Drill Sites 14 total e Avg Pad Width 15 m e Avg Length 20m e Avg Sump Dimensions 7L x 3W x 2D e Length of Road 610 m e Width of Road 5m e Slope 40 grade e Cut Slope Angle 70 deg e Fill Slope Angle 1 3H 1V B 18
114. unique requirements that necessitate the need for special techniques using the Model or external calculation using other tools or methods Most of the modules in the Model allow the user to implement different approaches to calculating the reclamation costs The most appropriate method in each instance will depend on the configuration of the facility and the requirements for reclamation and closure F simple projects little additional effort is necessary to produce a viable cost Import Cost Data in to the Model Cost data is imported into the Model using the Import Cost Data option from the custom StdRecCost menu see Figure 34 The cost data files may be supplied by a corporate or regulatory organization or created by the user as described in Chapter 4 Setting Up Cost Data Files If the cost data file changes you will need to re load the cost data to update the Model The data must be in the exact format contained in the user cost data file Cost Data USR xls or a standardized cost data file available from your company or local regulatory agency Links to some of these regulatory web sites are also listed on the Downloads page of the NVBond org web site nvbond org P T TF MR Figure 30 Import Cost Data Menu 6 1 Version 1 12 HOW DO I The standardized versions of the cost data file are locked and cannot be edited by the user These files are typically maintained and updated by corporations
115. villes cocina qoe rere dadana 2 9 Solution Management esses nnn 2 9 Gathering Your Data eene 3 1 Cost D l nn in 3 1 Project Data 3 3 Setting Up Cost Data Files 4 1 Source Dafa u E 4 2 Basis Region Table 5 rrr rrr ee rcr irr en 4 2 Equipment Gosts mumier 4 3 E 4 4 Reclamation Material COS S rrnnnnnvvnnnnnnnnnnnnnnnnnnvnnnnnnnnnnnnnnnnnenn 4 5 Miscellaneous Unit COStS rrrnnnnnnnnnnnvvvvnnnnnnnnnnnnnnnnvvnnnnnnnnnnnnnnnnen 4 5 Indirect COSTS aara D 4 6 Entering Data into the Model 5 1 rtipA cicHc jM 5 1 Basic Model Commands nnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn 5 2 Adding PAGING SS aa Re 5 3 i Version 1 12 TABLE OF CONTENTS Clearing User Data from a Worksheet mrrrnnrrnnnnnnnrrrnnnnnnvrnnnnnnnnnnnn 5 3 Deleting Facil GE 5 4 Entering Data into Worksheets rrrnnnnnvvvvnnnnnnnnnnnnnnnnvvnnnnnnnnnnnnn 5 4 Property InforTialloDis sie dieto risa 5 4 Exploration DAG vende 5 5 13 el 0 d 1110 89 41 0 REE 5 6 Exploration Trenches u 3er 5 6 Exploration Roads and Pads 11 eee 5 6 Mine Facilities cai erit au 5 8 Waste Rock Dumps and Heap Leach Pads sss 5 8 Tailings Impoundments aa eo ta i tiae eR Pep or lad 5 12 I Ot Te E E A E A EE 5 13 PIUS ae 5 14 Undergr
116. xample if one of the waste rock dumps needs four scrapers to haul topsoil and placement of cover on a tailings impoundment at the same time requires three scrapers then the total number of scrapers that must be mobilized is seven O Important Note Caution should be used when selecting the optimize option for fleet selection in many of the sheets If this option is selected the Model determines which of the standard fleets will perform the required activity for the lowest cost However indiscriminate use of the optimize option can result in the multiple types of fleets being selected when in reality the operator or a contractor is likely to only mobilize one fleet to perform the same activity at multiple locations on the site This could lead to an overestimate of mobilization costs Add Site Specific Costs for Materials There may be times that a site specific material cost is not included in the cost data wotksheet These costs can be entered into the material costs tab within the Model Costs can be entered for Revegetation materials Mulch Fertilizers and Monitoring Costs To enter site specific costs you will need to enter the cost into the green cells under the appropriate headings making sure to enter an appropriate description units and cost see Figure 40 A WAD Cyanide cost of 125 per sample Below the direct entry green cells for the specific costs there are another set of green direct entry cells where you need to enter th
117. zer push is on level ground because 1 2 of the volume would be pushed uphill and 2 would be pushed down hill Exploration Roads and Pads The Model can calculate the cost for reclaiming exploration drill roads on flat surfaces or slopes On flat areas Underlying Ground Slope 0 the Model will assume that no road regrading is required unless the user enters a volume in the Regrade Volume override cell On slopes the Model handles the regrade volume calculations for both exploration roads and pads using the same basic formulae Essentially the Model considers an exploration road to be a cut to fill road see Figure 12 and Figure 13 and a drill pad to be wide section of the road The basic formula for exploration road volume calculation is as follows Regrade Volume of Pads Cross sectional area of pad x 1 2 swell x Length of each Pad x No of Pads Regrade Volume of Road Cross sectional area of road x 1 2 swell x Length of Road Length of each Pad x No of Pads Version 1 12 ENTERING DATA Total Regrade Volume Regrade Volume of Pads Regrade Volume of Road Road Width w Original slope i Disturbed slope length c C2 Disturbed footprint width Disturbed slope length x cos Original slope Disturbed slope area Disturbed slope length x Road length Disturbed footprint area Disturbed footprint width x Road length Assumes 20 swell Az Ungraded slope Figure 12 Road Recontouring Calculation

SRCE User Manual - Standardized Reclamation Cost Estimator

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